Bøker

• Med hjertet på flere steder. Om barn, misjon og flerkulturell oppvekst, (red. med Marianne Skjortnes) Trondheim: Tapir Akademisk Forlag 2010, 393 s.
• Communication and Conversion in Northern Cameroon: The Dii people and Norwegian Missionaries, 1934-60, Leiden: Brill 2009, 244 s.
• La voie de l'islam et la voie du Christ : la croix et le croissant en Afrique de l'Ouest, (med Jean Koulagna) Meiganga: ILTM 2002, 182 s.

Artikler

• "Intercultural Communication and Religious Change: The Dii, Norwegian Missionaries, and Ferdinand de Saussure", Studia Theologica vol. 63, 1/2009: 3-18.
• "Misjonshistorie: fagets akademiske egenart og forhold til samfunnsvitenskapelige metoder", Norsk tidsskrift for misjonsvitenskap vol. 63, 1/2009: 3-18.
• "'And it is really thanks to you that we are saved...' An African Discourse on Conversion and the Creation of a Modern Myth", Exchange, vol. 36, 2007: 156-183.
• "A Missionary Discourse on Conversion: Norwegian Missionaries in Adamawa, Northern Cameroon 1934-1960", Mission Studies, vol. 24, 1/2007: 99-124.
• "Omvendelse fra islam til kristendom i Vest-Afrika: et sosiologisk perspektiv", Norsk tidsskrift for misjonsvitenskapvol. 61, 2-3/2007: 205-223.
• "Scientific Revolution and Religious Conversion - A Closer Look at Thomas Kuhn's Theory of Paradigm-Shift", Method and Theory in the Study of Religion, vol. 18, 3/2006: 232-254.
• "Anthropological Historical Research in Africa - How Do We Ask?", History in Africa, vol. 33,2006: 137-153.
• "The Role of Religion in Social Change: The Arrival of Christianity among the Dii People in Adamawa, Northern Cameroon (1934-1960)", Swedish Missiological Themes, vol. 93, 4/2005: 479-503.
• "Dar al-islam i Meiganga, Kamerun", Norsk tidsskrift for misjon, vol. 55, 1/2001: 17-34.
• "Islam and Ethnicity in Northern Cameroon", Swedish Missiological Themes, vol. 86, 1/1998: 45-68.
• "The Roots of the Islamic Resurgence", Ung teologi, vol. 29, 1/1996: 89-100.