TY JOUR TI Preliminary investigation of Russia and Mongolia: current problems of determination of content of the concepts «investigated case», «criminal case», «criminal prosecution», «termination of criminal proceedings» KW Russia KW Mongolia KW preliminary investigation KW concepts «investigated case» KW «criminal case» KW «criminal prosecution» KW «termination of criminal case» JO Vestnik of the St. Petersburg University of the Ministry of Internal Affairs of Russia AU Suprun, S.V. AU Ganbold, R.. PY 2019 IS 2019 PB SAINT-PETERSBURG UNIVERSITY OF THE MINISTRY OF INTERNAL AFFAIRS OF THE RUSSIAN FEDERATION