@article{UZMU_1951_148_148_a1,
     author = {D. P. Polozkov},
     title = {A study of generalized interpretations of the plane geometry of {Lobachevskii} and its geodesic lines},
     journal = {Uchenye Zapiski Moskovskogo Gosudarstvennogo Universiteta},
     pages = {9--14},
     publisher = {mathdoc},
     volume = {148},
     number = {148},
     year = {1951},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZMU_1951_148_148_a1/}
}