@article{IVM_1961_5_a5,
     author = {S. L. Pevzner},
     title = {Properties of second-order curves in the {Lobatchevsky} plane which are dual under the focal directrix},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {39--50},
     publisher = {mathdoc},
     number = {5},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1961_5_a5/}
}