Mayorga Vega, Daniel, Maribel Parra Saldías, and Jesús Viciana. 2017. “COMPARISON OF MODERATE-TO-VIGOROUS PHYSICAL ACTIVITY LEVELS BETWEEN PHYSICAL EDUCATION, SCHOOL RECESS AND AFTER-SCHOOL TIME IN SECONDARY SCHOOL STUDENTS: AN ACCELEROMETER-BASED STUDY”. Kinesiology 49 (2):242-51. https://hrcak.srce.hr/ojs/index.php/kinesiology/article/view/5775.