Bartkowiak, S., J. M. Konarski, R. Strzelczyk, J. Janowski, M. Karpowicz, and R. M. Malina. “Age at Menarche Among Rural School Youth in West-Central Poland: Variation With Weight Status and Population Growth”. Anthropological Review, vol. 84, no. 1, Mar. 2021, pp. 51-58, doi:10.2478/anre-2021-0006.