Петренко Володимир Іванович (Vladymyr Petrenko), and Петренко Іван Іванович (Ivan Petrenko). “Problems Attendance in Physical Education Students of Technical Specialties”. Slobozhanskyi Herald of Science and Sport, no. 6(44) (December 31, 2014): 87–91. Accessed April 27, 2024. https://journals.uran.ua/index.php/1991-0177/article/view/35430.