Álvarez Bogantes, C., Villalobos Víquez, G., Rodríguez Méndez, D., Herrera Monge, M. F., & Delgado Valverde, A. (2019). Physical Activity Levels at School: Use of the System for Observing Play and Leisure Activity in Youth (SOPLAY).

Álvarez Bogantes, Carlos, Grettel Villalobos Víquez, Diego Rodríguez Méndez, María Fernanda Herrera Monge, och Antonio Delgado Valverde. Physical Activity Levels At School: Use of the System for Observing Play and Leisure Activity in Youth (SOPLAY). 2019.

Álvarez Bogantes, Carlos, et al. Physical Activity Levels At School: Use of the System for Observing Play and Leisure Activity in Youth (SOPLAY). 2019.