@article{Velichko2019implementation,
author={Velichko, T.I. and Markova., O.A. and Tsyganenko, O.S. and Smirnov, A.G. and Nechushkin, Y.V.},
title={Implementation of a differentiated approach when teaching swimming students},
journal={Living psychology},
publisher={Ltd Radomir-M+},
year={2019},
pages={46-52},
volume={6},
issue={1},
}