@article{VTAMU_2019_24_126_a0,
     author = {S. E. Zhukovskiy and T. T. Ngok},
     title = {Existence of inverse function in a neighbourhood of a critical value},
     journal = {Vestnik rossijskih universitetov. Matematika},
     pages = {141--149},
     year = {2019},
     volume = {24},
     number = {126},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTAMU_2019_24_126_a0/}
}