00572naa#a2200169#i#450# EN\INFRA-M\bibl\42870 20241204084933.3 2587-6295 20210326b2021####ek#y0engy0150####ca RU Necessary knowledge for students about countering extremism (textbook «The Policy of countering extremism» edited by A. P. Koshkin Journal article Moscow INFRA-M Academic Publishing LLC. 2021 6 с. Journal article local Политика. 32 Matyuhin A. V. zh-szf.ru