Greier, Klaus, Herbert Riechelmann, Gerhard Ruedl, and Clemens Drenowatz. “Changes in Motor Competence over Four Decades in 10 to 14-Year-Old Austrian Boys”. Current Issues in Sport Science (CISS) 4 (November 6, 2019): 012. Accessed April 26, 2024. https://ciss-journal.org/article/view/7602.