@article{TRSPY_1992_193_a41,
     author = {E. V. Shchepin},
     title = {Covering homotopies and analytic mappings},
     journal = {Informatics and Automation},
     pages = {222--228},
     publisher = {mathdoc},
     volume = {193},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1992_193_a41/}
}