1. Ole Gjerløw, Beretning vedkommende Sekretærens Reise til Missionsmarken i Zululand og Natal 1887–88 (Stavanger: Det Norske Missionsselskab, 1888).
2. Erik Sidenvall, The Making of Manhood among Swedish Missionaries in China and Mongolia, c. 1890–c. 1914 (Leiden/Boston: Brill, 2009), 13.
3. Yvonne Maria Werner, ‘Religious Feminisation, Confessionalism and Re-masculinisation in Western European Society 1800–1960’, in Pieties and Gender, ed. Lene Sjørup and Hilda Rømer Christensen (Leiden: Brill, 2009).
4. The following biography on Christian Oftebro is based on Markus Dahle, ‘Christian Oftebro,’ in Hjem fra Kamppladsen: Livsbilleder af norske missionærer, ed. Anders Olsen (Kristiania: Steen’ske Bogtrykkeri og Forlag, 1906)
5. Christian Oftebro was a student of the so-called ‘third class’ of 1868/69, which is renowned as a class of missionary pioneers. There were two admissions; nine out of 23 applicants were accepted in 1868, and in the following year eight out of 22 applicants were accepted. See Emil Birkeli and C. Tidemann Strand, Kallet og veien: Det Norske Misjonsselskaps misjonsskole 1850–1959 (Stavanger: Misjonsselskapets Forlag, 1959), 40–6