TY JOUR TI Fundamentals of the constitutional system and state security as objects of criminal law protection in countering extremism KW constitutional system KW state security KW counteraction KW extremism KW extremist activity KW law JO Legal Science and Practice: Journal of Nizhny Novgorod Academy of the Ministry of Internal Affairs of Russia AU Akhmetshin, A.S. PY 2022 IS 2022 PB Nizhny Novgorod Academy of the Ministry of the Interior of Russia