Gurko, Tatiana A. “Mutual Assistance of Urban Parents and Adult Children: Differences in Age, Educational and Income Groups”. Sociologicheskaja nauka i social’naja praktika 8, no. 3 (September 26, 2020): 134-148. Accessed December 17, 2025. https://jour.fnisc.ru/index.php/socnp/article/view/7492.