Johansen, Bjørn Tore, Ketil Østrem, Stig Arve Sæther, and Martin Kjeøen Erikstad. “Relative Age and Perceptions of Soccer Specific Skills Among Elite Youth Players in Norway”. Current Issues in Sport Science (CISS) 4 (May 6, 2019): 006. Accessed December 22, 2024. https://ciss-journal.org/article/view/7601.