1. Synov VM. Correctional psychopedagogy. Oligophrenic pedagogy. Kyiv: NPU imeni M.P. Drahomanova; 2009.
2. Desai G, Chaturvedi SK. Daiyt li diagnosticheskie kriterii psihosomaticheskih issledovanii diagnosticu somaticheskih simptomov s medecinskoi tochki zrenia. Psychother Psychosom. 2016;85:121-122. https://doi.org/10.1159/00041063 PMid:26807856.
3. Fizeshi O. Historical-System Model of the Development of Primary School in Transcarpathia at the Tum of ХІХ-ХХ Centuries. Science and education. 2017;12:15-23.
4. Slepovich ES. Forming speech in preschool children with a delay in mental development. Minks: Nar. Asveta; 1989.
5. Sokolova EV. Psychology of children with delayed mental development. Moscow: TC Sfera; 2009.