Heredero, Eladio Sebastián, Claudia Inés Collado González, and Washington Cesar Shoiti Nozu. 2016. “Grouped Rural Centers in Spain. Analysis of Operation and Organization of Spanish Rural School from a Case Study”. Educação E Fronteiras 4 (12). Dourados:142-53. https://ojs.ufgd.edu.br/educacao/article/view/4716.