Wolski, D., J. Bednarski, I. Łuszczewska-Sierakowska, J. Michalik, A. Wawrzyniak, G. Nowicki, A. Bodajko-Grochowska, and J. Kosiński. “Relationships Between Body Weight and Percentage Body Fat in the Body and the Development of Osteopenia and Osteoporosis”. Journal of Education, Health and Sport, vol. 8, no. 9, Sept. 2018, pp. 727-3, https://apcz.umk.pl/JEHS/article/view/5925.