Keijer, Micha G., Aart C. Liefbroer, and Ineke Nagel. “Expectations about Fertility and Field of Study Among Adolescents: A Case of Self-Selection?”. Comparative Population Studies 440 (August 21, 2019). Accessed May 27, 2020. https://www.comparativepopulationstudies.de/index.php/CPoS/article/view/266.