Quantification of the degree of difficulty in making a save for a soccer goalkeeper

Hirashima, Y., Nakayama, M., Naito, K., & Asai, T. (2014). Quantification of the degree of difficulty in making a save for a soccer goalkeeper. Taiikugaku Kenkyu (Japan Journal of Physical Education, Health and Sport Sciences), 59(2), 805–816. https://doi.org/10.5432/jjpehss.13106