@article{MZM_1973_14_4_a6,
     author = {M. L. Gromov},
     title = {Degenerate smooth mappings},
     journal = {Matemati\v{c}eskie zametki},
     pages = {509--516},
     publisher = {mathdoc},
     volume = {14},
     number = {4},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1973_14_4_a6/}
}