ASAMAIGO, E. E.; OKOIYE, O. E. Effects of Cooperative Learning and Contingency Contracting on Mathematics Achievement of Pupils with Attention Deficit Hyperactivity Disorder in Delta State, Nigeria. Journal of Research in Education and Society (JRES) , [S. l.], v. 3, n. 3, p. 36–47, 2012. Disponível em: http://icidr.org.ng/index.php/Jres/article/view/1295. Acesso em: 19 sep. 2024.