Mikulec, Artur, Iwona Rosset, and Elżbieta Żądzińska. (2023) 2023. “Economic Stress Affects the Human Sex Ratio: A Retest of the Trivers–Willard Hypothesis in Poland”. Anthropological Review 86 (3):87-108. https://doi.org/10.18778/1898-6773.86.3.06.