External loads of elite soccer referees: A systematic review with meta-analysis - Preissler, A. V. B.; Reichert, T.; Schons, P.; Rocha Costa, R.; Sudatti Delevatti, R.; Denadai, B. S.; Kruel, L. F. M. (Research in Sports Medicine, 2023)
Keywords: soccer; referee; Europe; Latin America; GPS; performance statistics; performance; load; video; analysis; USA; sport games