Fernández-Ruiz, Vicente, López-Samanes, Álvaro, Del Coso, Juan, Pino-Ortega, José, Sánchez-Sánchez, Javier, Terrón-Manrique, Pablo, Beato, Marco and Moreno-Pérez, Víctor (2021) Influence of football match-play on isometric knee flexion strength and passive hip flexion range of motion in football referees and assistant referees. International Journal of Environmental Research and Public Health, 18 (22). ISSN 1660-4601