I. Morawik, A. Zarębska, M. Jędrych, M. Zajko, and M. Jabłoński, “Programmed body weight loss in morbidly obese women and its influence on general physical fitness, knee status and every day life activity”, Pol J Public Health, vol. 126, no. 2, pp. 88–90, Oct. 2016, doi: 10.1515/pjph-2016-0018.