@article{POPOVA2018on,
author={POPOVA, N.. and MUKOVA, L..},
title={ON THE ISSUE OF RUSSIAN TOURISM IN BULGARIA: GEOPOLITICAL, ECONOMIC AND LEGAL ASPECTS},
journal={Services in Russia and abroad},
publisher={Russian State University of Tourism and Service},
year={2018},
pages={17-31},
volume={11},
issue={8},
}