Mwaikambo L, Speizer I, Schurmann A, Morgan G, Fikree F. What works in family planning interventions: A systematic review of the evidence. Stud Fam Plann. 2011;42(2):67-82.

Suehiro, Y.,Altman, P.. Female volunteers: An asset to the reproductive health sector in rural Cambodia. Development in Practice. 2003. 13:346-360

Smith, C.,Ngo, T. D.,Gold, J.,Edwards, P.,Vannak, U.,Sokhey, L.,Machiyama, K.,Slaymaker, E.,Warnock, R.,McCarthy, O.,Free, C.. Effect of a mobile phone-based intervention on post-abortion contraception: a randomized controlled trial in Cambodia. Bull World Health Organ. 2015. 93:842-50a

Smith, C.,Ly, S.,Uk, V.,Warnock, R.,Edwards, P.,Free, C. (2017). Process evaluation of a mobile phone-based intervention to support post-abortion contraception in Cambodia Contracept Reprod Med, 2(#issue#), 16