Katus, Kalev, Allan Puur, Asta Põldma, Ewa Frątczak, Kamil Sienkiewicz, and Aneta Ptak-Chmielewska. “Fertility, Family Formation and Dissolution: Comparing Poland and Estonia 1989–2005”. Studia Demograficzne, no. 1(151) (June 14, 2007): 3–39. Accessed July 22, 2024. https://econjournals.sgh.waw.pl/SD/article/view/2610.