@article{Zimagulov2013hiller’s,
author={Zimagulov, T.. and Zimagulov, A.. and Bulgariev, G.G.},
title={Hiller’s surface form design method},
journal={Vestnik of Kazan State Agrarian University},
publisher={Kazan state agrarian University},
year={2013},
pages={63-66},
volume={8},
issue={3},
}