Altavilla, Gaetano. “Didactic Problem: Teaching and Methods in Volleyball”. Journal of Human Sport and Exercise 16, no. 4proc (November 11, 2021): S1698-S1704. Accessed April 24, 2024. https://www.jhse.ua.es/article/view/2021-v16-n4-proc-didactic-problem-teaching-methods-volleyball.