@article{Ptitsa2014mathematical,
author={Ptitsa, N.. and Nefedov, N..},
title={Mathematical modeling of influence of the cost of an hour of free time on demand in the retail trade},
journal={Actual directions of scientific researches of the XXI century: theory and practice},
publisher={FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov},
year={2014},
pages={182-186},
volume={2},
issue={4},
}