00661naa#a2200181#i#450# EN\INFRA-M\bibl\36438 20241202232824.1 2500-0500 20200312b2020####ek#y0engy0150####ca RU Formation of social activity of teenagers by means of school self-government Journal article Moscow INFRA-M Academic Publishing LLC. 2020 3 с. Journal article local Теория, методология и методы общественных наук в целом. Социография. 30 Shashikyan A. V. Sergienko N. L. naukaru.ru