1. Kosunen EA, Sihvo S, Nikula M, Hemminki E. Birth control. In: Koponen P, Luoto R, editors. Reproductive health in Finland. The Health 2000 survey. B/2004 ed. Helsinki: National Public Health Institute; 2004. ISBN 951-740-422-0.
2. Koponen P, Lindbohm M-L, Sihvo S. Pregnancies, deliveries, miscarriages and abortions. In: Koponen P, Luoto R, editors. Reproductive health in Finland. The Health 2000 survey. B/2004 ed. Helsinki: National Public Health Institute; 2004. ISBN 951-740-422-0.
3. National Agency for medicines and social Insurance Institution. The Finnish Statistics of Medicine 1995–2005. Helsinki: Edita Prima Oy. ISSN 0786-2180.
4. Nomesco. Medicines consumption in the Nordic countries 1999–2003. http://nomesco-eng.nom-nos.dk/default.asp?side=204 . Accessed 10 Sep 2009.
5. National Research and Development Centre for Welfare and Health (STAKES). Reproduction. http://www.stakes.fi/EN/Tilastot/statisticsbytopic/index.htm . Accessed 10 Sep 2009.