%0 Journal Article %T Classification of samples for comparative research %A Ivanova, E.S. %K types of comparative samples, obtaining samples for comparative research in the process of operational search activities, possibility of obtaining samples before the initiation of a criminal case %J Vestnik of the St. Petersburg University of the Ministry of Internal Affairs of Russia %D 2019 %N 2019 %P 4 %I SAINT-PETERSBURG UNIVERSITY OF THE MINISTRY OF INTERNAL AFFAIRS OF THE RUSSIAN FEDERATION