@article{TM_2004_247_a2,
     author = {S. A. Bogatyi and E. A. Kudryavtseva and H. Zieschang},
     title = {On the {Coincidence} {Points} of {Mappings} of the {Torus} into a {Surface}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {15--34},
     publisher = {mathdoc},
     volume = {247},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2004_247_a2/}
}