Clark LE, J. Rhea D. The LiiNK Project®: Comparisons of Recess, Physical Activity, and Positive Emotional States in Grades K-2 Children. Int. J. Child Health Nutr. [Internet]. 2017 May 24 [cited 2024 Nov. 23];6(2):54-61. Available from: https://mail.lifescienceglobal.com/pms/index.php/ijchn/article/view/4658