GALVÃO SPINILLO, Alina. THE FIRST-ORDER RELATIONS IN PROPORTIONALTASKS:: ANOTHER VIEW ON CHILDREN’S DIFFICULTIES WITH PROPORTION. Psicologia: Teoria e Pesquisa, [S. l.], v. 9, n. 2, p. 349–364, 2013. Disponível em: https://periodicos.unb.br/index.php/revistaptp/article/view/17223. Acesso em: 18 may. 2024.