Ritta, J., A. Janel, E. Marjan, A. Dauresh, I. Aigul, and K. Gulsum. “The Phenomenon of Musical Art in the Education of Individuals”. Journal of Intellectual Disability - Diagnosis and Treatment, vol. 6, no. 3, Oct. 2018, pp. 125-30, doi:10.6000/2292-2598.2018.06.03.10.