Mahdi, Elahe, et al. “Evaluation of the Effectiveness of Virtual Mathematics Teaching Based on Manipulative Mathematical Learning in 5th Grade Elementary Male Students With Mathematical Learning Disabilities in the COVID-19 Pandemic”. Iranian Journal of Neurodevelopmental Disorders, vol. 1, no. 3, Sept. 2022, pp. 31-40, https://maherpub.com/jndd/article/view/10.