00606naa#a2200157#i#450# EN\FGKOU VO SPBU MVD ROSSII\bibl\102935 20251021070444.2 2227-7226 20251011b2025####ek#y0engy0150####ca RU The concept and essence of citizens' assistance to bodies implementing operational investigative activities Journal article St. Petersburg SAINT-PETERSBURG UNIVERSITY OF THE MINISTRY OF INTERNAL AFFAIRS OF THE RUSSIAN FEDERATION 2025 6 с. Journal article local Popov Sergey Viktorovich vestnikkf.ru