A comparison of the internal and external load demands imposed on professional soccer referees in FIFA`s current model of physical test in relation to games - Preissler, A. A.; Schons, P.; Costa, R. R.; Reichert, T.; Oliveira, H. B.; de Vargas, G. D.; Ribeiro, F. L.; Brito, G. R.; Zanella, J. C.; Klein, L. M.; Denadai, B. S.; Kruel, L. F. (The Journal of Sports Medicine and Physical Fitness, 2022)