1. monographs

• The unfree free church. Der Bund der Baptistengemeinden im 'Dritten Reich', Historisch-Theologische Studien zum 19. und 20. Jahrhundert, vol. 1, Neukirchen-Vluyn 1991, 343 pp. (2nd verb. Edition: Wuppertal/Kassel/Zurich 1995; dissertation; 3rd edition in preparation)
• "More zealous than Zwingli." Die frühe Täuferbewegung in der Schweiz (habilitation thesis), Berlin 2003, 617 p. (2nd unedited ed. 2022)

2. editorships

a) Specialist journals

• Since 2012 managing editor of the international journal "Kirchliche Zeitgeschichte/Contemporary Church History" (KZG/CHH)
• Since 2011 editor-in-chief and co-editor of the Zeitschrift für Theologie und Gemeinde (ZThG)

b) Monographs

• Between heaven and earth. Commemorative publication on the 100th anniversary of the Evangelical Free Church Munich (ed. with Kim Strübind), Munich 2002
• Faith - Freedom - Dictatorship in Europe and the USA. Commemorative publication for Gerhard Besier on his 60th birthday (ed. with Katarzyna Stoklosa), Göttingen 2007
• Education - Advancement - Freedom. Commemorative publication for the farewell of Prof Dr Friedrich Wißmann, Oldenburg 2008
• Baptism in history and Present (ed. with Martin Rothkegel), Göttingen 2012
• Jan Hus. 600 years of the First Reformation (ed. with Tobias Weger), Publications of the Federal Institute for Culture and History of the Germans in Eastern Europe, vol. 60, Oldenburg 2015
• Encounters - Encounters. Contributions to the modern question of God, contextual theology and ecumenism. Festgabe for Ulrike Link-Wieczorek (ed. with Johanna Rahner), Supplements to the Ecumenical Review 102, Leipzig 2015
• Walter Rauschenbusch. Published Works and Selected Writings in Three Volumes, Volume I (ed. with William H. Brackney), Atlanta 2018
• Women in Church Ministries. Reform Movements in Ecumenism (ed. with Margit Eckholt/Dorothea Sattler/Ulrike Link-Wieczorek), Freiburg/Göttingen 2018
• "The truth is deadly". Martyr books and their significance for confessional identity and spirituality in the early modern period (ed. with Klaas Dieter Voß), Tübingen 2018
• Women in Church Ministries. Reform Movements in Ecumenism (ed. with Margit Eckholt/Dorothea Sattler/Ulrike Link-Wieczorek), Collegeville 2021

3. further academic publications

1991

• Review: H. Strahm, Die Bischöfliche Methodistenkirche im Dritten Reich, MKSt 3, Stuttgart 1989, in: KZG/CCH 4 (1991), pp. 322-325
• Review: M. Schreiber, Friedrich Justus Perels. Ein Weg vom Rechtskampf der Bekennenden Kirche in den politischen Widerstand, HUWJK 5, Munich 1989, in: KZG/CCH 4 (1991), pp. 328-330

1993

• Free churches and ecumenism in the post-war period, in: KZG/CCH 6 (1993), pp. 187-211
• Diakonie der Freikirchen im NS-Staat, in: Diakonie Jahrbuch 1993, ed. by Karl-Heinz Neukamm, Stuttgart 1993, pp. 106-124
• Art. "Kirchenkampf", in: Evangelisches Lexikon für Theologie und Gemeinde (ELThG), vol. 2 (1993), pp. 1104-1111

1995

• Die Aufarbeitung der Geschichte der Freikirchen in Deutschland im 'Dritten Reich' unter besonderer Berücksichtigung ihrer Archive, in: Archivbericht der Evangelischen Kirche in Berlin-Brandenburg 5 (1995), pp. 99-112
• Notes on the neo-charismatic movement, in: Orientierungen und Berichte 21, published by the Protestant Centre for Worldview Issues (EZW), Stuttgart/Berlin 1995, pp. 30-42

1996

• Review: U. Materne/G. Balders (eds.), Erlebt in der DDR. Berichte aus dem Bund Evangelisch-Freikirchlicher Gemeinden, in: KZG/CCH 9 (1996), pp. 388-395 (also published in: Zeitschrift für Theologie und Gemeinde [ZThG] 2 [1997], pp. 288-295)

1997

• Keyword: "Herbert from Halle". A research report on the connections between Baptists and the Ministry for State Security in the GDR, in: Zeitschrift für Theologie und Gemeinde (ZThG) 2 (1997), pp. 164-201

1998

• The Free Church demand for "separation of church and state" in the face of dictatorial systems, in: Freikirchenforschung 8 (1998), pp. 86-106

1999

• Dictatorship and history. Reflections on the progress of historical reappraisal in the Federation of Evangelical Free Churches in Germany, in: Zeitschrift für Theologie und Gemeinde (ZThG) 4 (1999), pp. 252-258
• Separation of Church and State? Proving and failing of a free-church principle, in: Zeitschrift für Theologie und Gemeinde (ZThG) 4 (1999), pp. 261-288
• Service to the people. Das Diakoniewerk Tabea und das Dritte Reich, in: Zeitschrift für Theologie und Gemeinde (ZThG) 5 (2000), pp. 66-98 (also published in: Diakoniewerk Tabea e.V. [ed.], 100 Jahre Tabea: "Dienen ist Leben", Hamburg 1999, pp. 92-121)
• Review: H.-J. Goertz, Konrad Grebel. Critic of pious appearances 1498-1526. A biographical sketch, Hamburg 1998, in: Freikirchenforschung 9 (1999), pp. 298-303

• Baptist congregations in Germany since 1945, lecture on the occasion of the 1999 KZG symposium: Free churches between society and mainline churches since 1945. A comparison of Italy and Germany, in: KZG/CCH 13 (2000), pp. 391-413

2002

• The German Baptists and National Socialism, in: Zeitschrift für Theologie und Gemeinde (ZThG) 7 (2002), pp. 177-194
• Review: H.-G. Tanneberger, Die Vorstellung der Täufer von der Rechtfertigung des Menschen, Stuttgart 1999, in: Zeitschrift für Theologie und Gemeinde (ZThG) 7 (2002), pp. 355-360
• Art. Free Churches in the GDR, in: Lexikon der deutschen Geschichte von 1945 bis 1990. Ereignisse, Institutionen, Personen im geteilten Deutschland, ed. by Michael Behnen, Stuttgart 2002, pp. 232-233
• Art. Jewish communities in the GDR, in: Encyclopaedia of German History from 1945 to 1990. Events, Institutions, Persons in Divided Germany, ed. by Michael Behnen, Stuttgart 2002, pp. 328-329

2003

• Art. Baptists, in: Taschenlexikon Ökumene, ed. by Harald Uhl, Frankfurt a.M. 2003, pp. 33-35
• Review: L. Beaupain, Eine Freikirche sucht ihren Weg. Der Bund Freier evangelischer Gemeinden in der DDR, Theologische Verlagsgemeinschaft R. Brockhaus/Brunnen, Wuppertal 2001, in: JETh 17 (2003)
• Evangelical Free Church congregations in the GDR from the perspective of the SED state, in: Zeitschrift für Theologie und Gemeinde (ZThG) 8 (2003), pp. 245-279
• "We see ourselves entangled in the guilt of our people and our covenant community". On the genesis and function of the 1984 confession of guilt, in: Zeitschrift für Theologie und Gemeinde (ZThG) 8 (2003), pp. 306-321

2004

• Religious peace without religious freedom. The impact of the Peace of Westphalia on religious minorities, in: Lena Lybæk (ed.), Gemeinschaft der Kirchen und gesellschaftliche Verantwortung: Die Würde des Anderen und das Recht anders zu denken. Festschrift for Professor Dr Erich Geldbach. Ecumenical Studies, Münster 2004, pp. 504-526
• The popular uprising of 17 June 1953 and the behaviour of the churches and religious communities, in: KZG/CCH 17 (2004), pp. 63-99
• Martin Luther King and the "Black Church" as a vehicle of the civil rights movement, in: KZG/CCH 17 (2004), pp. 500-518
• Review: Franz Graf-Stuhlhofer, Öffentliche Kritik am Nationalsozialismus im Großdeutschen Reich (Historisch-Theologische Studien zum 19. und 20. Jahrhundert, vol. 9), Neukirchen 2001, in: JETh 18 (2004), pp. 331-335

2006

• "Right of resistance" as an elementary theme in the traditions of the Free Church, in: Martin Leiner/Hildigund Neubert et al. (eds.), Gott mehr gehorchen als den Menschen. Christliche Wurzeln, Zeitgeschichte und Gegenwart des Widerstands, Göttingen 2005, pp. 137-168 (published in ZThG 10 [2005], pp. 162-192 and in: Erich Geldbach/Markus Wehrstedt/Dietmar Lütz, Religionsfreiheit. Festschrift zum 200. Geburtstag von Julius Köbner, Berlin 2006, pp. 193-232)
• Josef Halmos, in: Harald Schultze/Andreas Kurschat (eds.), "Ihr Ende schauet an ..." Protestant martyrs of the 20th century, Leipzig 2006, pp. 645-646
• Katharina Zell - Eine Wegbereiterin für religiöse Toleranz, in: Waltraud Ernst/Ulrike Bohle (eds.), Geschlechterdiskurse zwischen Fiktion und Faktizität. International Women's and Gender Studies in Lower Saxony, Volume 3 (Focus Gender 6), Hamburg 2006, pp. 171-201

2007

• Why the paths parted. The dispute over the understanding of baptism in the early days of German Baptism and the emergence of the Free Evangelical Churches, in: Zeitschrift für Theologie und Gemeinde (ZThG) 12 (2007), pp. 241-271
• "We Christians among spectators". The German Baptists and the persecution of the Jews during the Nazi dictatorship, in: Glaube - Freiheit - Diktatur in Europa und den USA. Festschrift for Gerhard Besier on his 60th birthday (ed. by Katarzyna Stoklosa/Andrea Strübind), Göttingen 2007, pp. 113-140

2008

• "Remembered Future". New positions, approaches and concepts in the didactics of church history, in: Zeitschrift für Theologie und Gemeinde (ZThG) 13 (2008), pp. 96-105
• Free will and religious tolerance. Church historical perspectives, in: Journal for Theology and Community (ZThG) 13 (2008), pp. 213-242

2009

• The free-church understanding of church and congregation. A Baptist view, in: Catholica 63 (2009), pp. 27-47
• (with Kim Strübind) Taufe als Advent der Gnade Gottes - eine baptistische Perspektive, in: Wolf-Michel Catenhusen et al (eds.), Damit ihr Hoffnung habt. Das Buch zum Ökumenischen Kirchentag 2010, Freiburg i. Br. u.a. 2009, pp. 94-97
• A dynamic understanding of the church, Baptism in the past and present, in: Herder Korrespondenz 63 (2009), No. 12, pp. 642-646
• The "church of the free". Congregationalism as a model for church reform. 400 years of Baptism, in: Materialdienst des Konfessionskundlichen Instituts Bensheim (MD) 60 (2009), Issue 6, pp. 103-109

2010

• Rays break many from one light. A Baptist point of view on the "inner" and "outer" ecumenism of the Federation of Evangelical Free Churches in Germany (BEFG) in: Journal for Worship and Preaching 28 (2010), pp. 10-13

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