@article{ZNSL_1991_193_a3,
     author = {A. A. Ivanov},
     title = {On the problem of spacelike properties of continuous mappings},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {64--71},
     year = {1991},
     volume = {193},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1991_193_a3/}
}