Gugała, Barbara, and Sławomir Snela. “Studies of Effectiveness of Botuline in Treatment of Functional Contracture of Lower Extremities in Children With Cerebral Palsy”. European Journal of Clinical and Experimental Medicine 5, no. 4 (December 30, 2007): 346–349. Accessed July 16, 2026. https://journals.ur.edu.pl/ejcem/article/view/13309.