@article{IVM_1963_2_a8,
     author = {G. N. Makeev},
     title = {Focal parabolic pairs of congruences},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {70--83},
     publisher = {mathdoc},
     number = {2},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1963_2_a8/}
}