@article{Levandovskaya2019role,
author={Levandovskaya, V.A. and Akimov, A.A. and Soloschenko, M.Y.},
title={Role of elective courses in training of mathematics in profile classes},
journal={Profession-Oriented School},
publisher={INFRA-M Academic Publishing LLC.},
year={2019},
pages={24-27},
volume={7},
issue={4},
}