@article{IVM_1961_6_a5,
     author = {J. \v{S}. Kaplunovi\v{c}},
     title = {Some properties of isoclines},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {43--50},
     publisher = {mathdoc},
     number = {6},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1961_6_a5/}
}