TY JOUR TI PENITENTIARY EXTREMISM: THE SCALES OF THREAT AND A CIRCUMSTANCE PROMOTING COMMISSION OF OFFENSES OF EXTREMIST CHARACTER KW counteraction to extremism KW the reasons of offenses KW correctional facilities KW circumstances promoting commission of offenses of extremist character JO Man: crime and punishment AU YAVORSKY, M.. PY 2017 IS 25 PB Academy of the FPS of Russia