Ratner, F. L., and V. L. Efimova. “Integrating the Educational Principles of Maria Montessori in the Process of Pedagogical Support for Pupils With Learning Disabilities”. International Review of Management and Marketing, vol. 6, no. 3S, Mar. 2016, pp. 118-24, https://www.econjournals.com/index.php/irmm/article/view/2199.