@article{2017the,
author={, .. and , ..},
title={THE PROBLEM OF CLASSIFICATION OF ELECTRONIC LEARNING SYSTEMS AND VARIANTS FOR ITS SOLUTIONS},
journal={Volgograd Academy of the Ministry of the Interior of Russia},
publisher={Volgograd Academy of the Ministry of Internal Affairs of Russia},
year={2017},
pages={132-138},
volume={},
issue={4},
}