Chaves-Cordero, Carlos Fernando, and Catalina Escamilla-Fonseca , trans. 2017. “Choral Conducting Studies and Tools Required for the Development of Children´s Choirs. Current Situation in Costa Rica and Spain”. Revista Electrónica Educare 21 (1): 1-23. https://doi.org/10.15359/ree.21-1.5.