@article{IVM_1963_5_a4,
     author = {M. V. Girshovich},
     title = {On conditions for effecting second-degree constructions in the {Lobatchevsky} plane using only a ruler},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {30--38},
     publisher = {mathdoc},
     number = {5},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1963_5_a4/}
}