Michael, Marc; King, Lawrence; Guo, Liang; McKee, Martin; Richardson, Erica; Stuckler, David (2013). "The Mystery of Missing Female Children in the Caucasus: An Analysis of Sex Ratios by Birth Order". International Perspectives on Sexual and Reproductive Health. 39 (2). ss. 97-102. doi:10.1363/3909713. PMID23895886.
Michael, Marc; King, Lawrence; Guo, Liang; McKee, Martin; Richardson, Erica; Stuckler, David (2013). "The Mystery of Missing Female Children in the Caucasus: An Analysis of Sex Ratios by Birth Order". International Perspectives on Sexual and Reproductive Health. 39 (2). ss. 97-102. doi:10.1363/3909713. PMID23895886.
International Planned Parenthood Foundation European Network (February 2004). Abortion Legislation in Europe(PDF). s. 5. 11 Mart 2012 tarihinde kaynağından(PDF) arşivlendi. Erişim tarihi: 29 Mart 2023.
International Planned Parenthood Foundation European Network (January 2009). Abortion Legislation in Europe(PDF). ss. 6-7. 22 Şubat 2014 tarihinde kaynağından arşivlendi(PDF). Erişim tarihi: 29 Mart 2023.
International Planned Parenthood Foundation European Network (January 2009). Abortion Legislation in Europe(PDF). ss. 6-7. 22 Şubat 2014 tarihinde kaynağından arşivlendi(PDF). Erişim tarihi: 29 Mart 2023.
International Planned Parenthood Foundation European Network (February 2004). Abortion Legislation in Europe(PDF). s. 5. 11 Mart 2012 tarihinde kaynağından(PDF) arşivlendi. Erişim tarihi: 29 Mart 2023.