Intriago, K. E. C., L. M. A. Rodríguez, and L. A. T. Cevallos. “Specific Learning Difficulty: Autism, Dyscalculia, Dyslexia and Dysgraphia”. International Research Journal of Engineering, IT and Scientific Research, vol. 7, no. 3, Apr. 2021, pp. 97-106, doi:10.21744/irjeis.v7n3.1539.