@article{VSPUI_2013_3_a15,
     author = {V. N. Ushakov and A. A. Uspenskiy and P. D. Lebedev},
     title = {Geometry of singular curves for one class of velocity},
     journal = {Vestnik Sankt-Peterburgskogo universiteta. Prikladna\^a matematika, informatika, processy upravleni\^a},
     pages = {157--167},
     publisher = {mathdoc},
     number = {3},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSPUI_2013_3_a15/}
}