@article{Artsikhovskaya-Kuznetsova2014puzzles,
author={Artsikhovskaya-Kuznetsova, L..},
title={Puzzles of Descriptive Geometry},
journal={Geometry & Graphics},
publisher={INFRA-M Academic Publishing LLC.},
year={2014},
pages={31-35},
volume={2},
issue={3},
}