What to look for in setting sports training tasks for young players [?]: Analysis of the numerical configuration of players and court size constraints on futsal small-sided games performance difficulty level and player participation - Rigon, Thiago André; Drezner, Rene; Nogueira, Fábio Ferreira; Yousefian, Farzad; Travassos, Bruno; Dantas, Luiz Eduardo Pinto Basto Tourinho (International Journal of Performance Analysis in Sport, 2023)