1. Abou, C., Wardlaw, T., Hill, K, & Choi, Y. (n.d.). Maternal mortality in 2000: Estimates developed by WHO, UNICEF, and UNFPA. Retrieved May 5, 2010, from http://www.reliefweb.irh/library/documents/2003/who-saf-220cf.pdf .
2. Agrafiotis, D., Ioannida, E., & Mandi, P. (2004). Greece. In R. Francoeur & R. Noonan (Eds.), The continuum complete international encyclopedia of sexuality (pp. 479–488). New York: The Continuum International.
3. Aldenderfer, M. S., & Blashfield. (1984). Cluster analysis. Beverly Hills: Sage.
4. Anderson, R., & Fetner, T. (2008). Economic inequality and intolerance: attitudes toward homosexuality in 35 democracies. American Journal of Political Science, 52(4), 942–958.
5. Bacak, V., Štulhofer, A., Sol, D., Landripet, I. (2009). Religion and sexuality during transition: A longitudinal study of Croatian college students and sexual risks, 1998–2008. Paper presented at the World Association of Sexual Health, Göteborg, Sweden.