1. Vedeneeva E. V. Interrelation of a motivational component of personal helplessness and leading activity on different age stages. Vestnik Tomskogo gosudarstvennogo universiteta, 2009, (322): 186–189. (In Russ.) https://www.elibrary.ru/lhqqdv
2. Volkova O. V. The learned helplessness: technology of genesis research. Novosibirsk: SB RAS, 2018, 229. (In Russ.) https://www.elibrary.ru/hilmuh
3. Volkova O. V. The level of teenagers' will-power development as a condition determining the level of adults' learned helplessness manifestation. Sibirskiy Psikhologicheskiy Zhurnal, 2017, (66): 66–81. (In Russ.) https://doi.org/10.17223/17267080/66/5
4. Vygotsky L. S. The history of the development of higher mental functions. Moscow: Iurait, 2016, 359. (In Russ.) https://elibrary.ru/xmqgwz
5. Vygotsky L. S. Collected works. Vol. 4. Child psychology. Moscow: Kniga po trebovaniu, 2013, 432. (In Russ.)