Childlessness

Rudert on Prezi. prezi.com. [2014-09-14]. （原始内容存档于2016-04-04）.  "Tax on childlessness, which existed in the Soviet Union, proposed to be restored" ("Налог

Baudin, Thomas; de la Croix, David; Gobbi, Paula E. Fertility and Childlessness in the United States. American Economic Review. 2015-01-01, 105 (6):

women 互联网档案馆的存檔，存档日期2020-09-15.. Nature. July 23, 2018. Arie de Graaf. Childlessness and education level. Statistics Netherlands. 24 May 2004 [31 May 2020]

Michelmann HW, Hinney B, Reuter M, Kallerhoff M, Ringert RH. Voluntary Childlessness and being Childfree. British Journal of General Practice. 1997, 47 (415):

Rutstein, Shea O., and Iqbal H. Shah. "Infecundity, Infertility, and Childlessness in Developing Countries." DHS Comparative Reports No. 9 (2004): 1-57