Mathisen GE, Jensen RM, Pettersen SA. Aerobic Games and Playful exercises in 9-Year-Old Boys: Intensity and Fitness Effects. REI [Internet]. 1. april 2016 [citirano 8. november 2025];9(1/2):57-64. Dostopno na: https://old.journals.um.si/index.php/education/article/view/374