@article{DAN_1986_288_2_a12,
     author = {V. V. Fedorchuk},
     title = {Characterization of $n$-soft mappings},
     journal = {Doklady Akademii Nauk},
     pages = {313--316},
     publisher = {mathdoc},
     volume = {288},
     number = {2},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1986_288_2_a12/}
}