Errama, Mostafa, Mustapha Bassiri, Jafaar Atifi, and Said Lotfi. “Assessing the Efficiency of Reduced Positional Games in Soccer: A Multivariate Analysis of Technical and Tactical Indicators According to Different Playing Systems”. Physical Education Theory and Methodology 25, no. 3 (May 30, 2025): 625–632. Accessed June 12, 2026. https://tmfv.com.ua/journal/article/view/3306.