Aziz Kareem, R. y Mezaal Mezban, Z. (2019) «The Effect of Karen’s Model in The Achievement and The Development of Levels of Understanding Mathematics for female Students Intermediate», Opción, 350, pp. 1337-1365. Disponible en: https://www.produccioncientificaluz.org/index.php/opcion/article/view/27384 (Accedido: 2mayo2024).