Krajewska-Kułak , Elżbieta, et al. “The Problem of the Interent Addcition Among Physiotherapy Students”. Nursing in the 21st Century, vol. 9, no. 3/4(32/33), Mar. 2011, pp. 31-39, https://czasopisma.umlub.pl/piel21w/article/view/2708.