Chilimoniuk, Zuzanna, Aleksandra Borkowska, Aleksandra Chałupnik, Karolina Raksa, Anna Sobstyl, and Halina Piecewicz-Szczęsna. 2018. “The Problem of Obesity and Overweight Among Children and Youth in the World”. Journal of Education, Health and Sport 8 (9):1541-47. https://apcz.umk.pl/JEHS/article/view/6102.