Bratko, Denis, Viktorija Trninić, and Marko Trninić. “Motivational Differences Between Athletes at Junior and Senior Level: An Analysis of the Football, Handball, and Water Polo Players”. Journal of Human Sport and Exercise 17, no. 3 (July 1, 2022): 616–625. Accessed April 20, 2024. https://www.jhse.ua.es/article/view/2022-v17-n3-motivational-differences-athletes-junior-senior-leve.