@article{IVM_1980_12_a12,
     author = {V. G. Ivanov},
     title = {Generalized parallelism in a~space of two dimensions $M_2$},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {69--71},
     publisher = {mathdoc},
     number = {12},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1980_12_a12/}
}