TY JOUR TI Implementation of the principle of differentiation of execution of punishment in the norms of criminal executive legislation Russian Federation KW penal legislation KW principles KW differentiation of execution of punishment KW individualization of punishment KW convicts KW correction KW implementation KW correctional institutions KW resocialization KW lawful behavior JO Legal Science and Practice: Journal of Nizhny Novgorod Academy of the Ministry of Internal Affairs of Russia AU Kirillov, M.A. AU Petryanin, A.V. AU Savelyev, V.V. PY 2019 IS 2019 PB Nizhny Novgorod Academy of the Ministry of the Interior of Russia