Omelan, A. A., K. Borysławski, and R. S. Podstawski. “Body Composition and Level of Physical Activity of Elderly People Living in North-Eastern Poland Associated With Socioeconomic Factors”. Anthropological Review, vol. 85, no. 3, Sept. 2022, pp. 31-46, doi:10.18778/1898-6773.85.3.03.