Shilova, Olga, and Olga Piskun. “Volitional Effort Formation in Senior Preschool Children With Speech Impairments Using Visual Modeling”. Armenian Journal of Special Education 3, no. 1 (February 26, 2021): 66-84. Accessed April 21, 2021. https://specedjournal.aspu.am/index.php/se/article/view/261.