00591naa#a2200181#i#450# EN\\bibl\88009 20260320032631.5 2074-8183 20160925b2016####ek#y0engy0150####ca RUS RU PROCEDURAL FORMS OF COOPERATION WITH THE OPERATIONAL SERVICES OF THE INVESTIGATOR IN THE INVESTIGATION OF CRIMES OF AN EXTREMIST Journal article Volgograd Volgograd Academy of the Ministry of Internal Affairs of Russia 2016 4 с. Journal article local va-mvd.editorum.ru