@article{Melikhov2025pre-state,
author={Melikhov, A.I. and Kapitanec, Y.V.},
title={Pre-state history of operational investigative activities},
journal={Bulletin of the Kaliningrad branch of the Saint-Petersburg University of the Ministry of Internal Affairs of Russia},
publisher={SAINT-PETERSBURG UNIVERSITY OF THE MINISTRY OF INTERNAL AFFAIRS OF THE RUSSIAN FEDERATION},
year={2025},
pages={111-119},
volume={0},
issue={3},
}