1.
Aoyagi K, Ishii K, Shibata A, Arai H, Oka K. Expected Qualifications for External Coaches in School-Based Extracurricular Sports Activities. JESR [Internet]. 2015Sep.4 [cited 2022May25];5(3):53. Available from: https://www.richtmann.org/journal/index.php/jesr/article/view/7699