@article{IVM_1960_6_a19,
     author = {S. L. Pevzner},
     title = {Focal-directrix properties of curves of second order on the {Lobachevsky} plane},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {184--194},
     publisher = {mathdoc},
     number = {6},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1960_6_a19/}
}