TY JOUR TI Disclosure of fraud using information and telecommunications technologies KW fraud KW information and telecommunication technologies KW crime KW disclosure KW operational detective activity JO Vestnik of the St. Petersburg University of the Ministry of Internal Affairs of Russia AU Ozerov, K.I. PY 2021 IS 2021 PB SAINT-PETERSBURG UNIVERSITY OF THE MINISTRY OF INTERNAL AFFAIRS OF THE RUSSIAN FEDERATION