@article{VMUMM_2014_6_a10,
     author = {O. A. Zagryadskii},
     title = {The relations between the {Bertrand,} {Bonnet,} and {Tannery} classes},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {62--64},
     year = {2014},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2014_6_a10/}
}