1. https://www.vocabulary.com/dictionary/psyche
2. Vygotsky, L. S. (1934). Mishlenie I Retch (Russ). https://fip.kpmo.ru/es_ru/0_publication_109_1.pdf
3. Subbotsky, E. V. (1976). Psychology of partnership relations in preschoolers (In Russ). Lomonosov State University Publ.
4. Luria, A. R., & Subbotsky. E. V. (1978). Zur fruhen Ontogeneze der steuerden Funktion der Sprache. Die Psychologie des 20 Jahrhunderts (pp. 1032–1048). KinderVerlag.
5. Subbotsky, E. (1996). Vygotsky’s Distinction between lower and higher mental functions and recent studies on infant cognitive development. Journal of Russian and East European Psychology, 34(2), 61–66.