CHIA, Noel Kok Hwee; PENG KHO, Chiew. An Investigative Study on the Learning Difficulties in Mathematics Encountered by Primary 4 Children: In Search of a Cognitive Equation for Mathematics Learning. Journal of the American Academy of Special Education Professionals, [S. l.], v. 6, n. 1, p. 112–138, 2011. DOI: 10.64546/jaasep.134. Disponível em: https://www.aasep.org/article/view/134. Acesso em: 23 sep. 2025.