@article{VMUMM_1996_4_a13,
     author = {M. V. Shamolin},
     title = {An introduction to the problem of the braking of a body in a resisting medium, and a new two-parameter family of phase portraits},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {57--69},
     year = {1996},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1996_4_a13/}
}