Validity and reliability of a 6-a-side small-sided game as an indicator of match-related physical performance in elite youth Brazilian soccer players - Aquino, Rodrigo Leal de Queiroz Thomaz de; Melli Neto, Bruno; Ferrari, João Victor S.; Bedo, Bruno Luiz de Souza; Vieira, Luiz H. Palucci; Santiago, Paulo Roberto Pereira; Gonçalves, Luiz Guilherme C.; Oliveira, Lucas P.; Puggina, Enrico Fuini (Journal of Sports Sciences, 2019)