Jasim Al-Dulaimy, B. M., Jabbar Faris, I. y Risen Al-Kinan, H. K. (2019) «Two Strategies Are Proposed According To Active Education And Their On The Effect On The Acquisition Of Mathematical Concepts For Second Grade Students In Mathematics», Opción, 350, p. 28. Disponible en: https://mail.produccioncientificaluz.org/index.php/opcion/article/view/31555 (Accedido: 8junio2025).