Kirchengast, Sylvia, and Beatrix Putz. “Discriminative Grandparental Investment – the Impact of grandchild’s Gender and Sociodemographic Parameters”. Anthropological Review 79, no. 2 (June 30, 2016): 151–167. Accessed December 8, 2025. https://www.czasopisma.uni.lodz.pl/ar/article/view/11428.