Sancho-Monllor , B, J L Arjol-Serrano, and P Bellosta-López. 2020. “BACKGROUND OF NON-SPECIFIC GROIN INJURY AND CONCENTRIC MAXIMUM POWER VALUES IN ADOLESCENT SOCCER PLAYERS”. Cuestiones De Fisioterapia 49 (1): 37-47. http://cuestionesdefisioterapia.es/index.php/cf/article/view/124.