@article{DAN_1989_308_5_a5,
     author = {R. S. Sadyrkhanov},
     title = {Local and global implicit function theorems for equations with},
     journal = {Doklady Akademii Nauk},
     pages = {1050--1053},
     publisher = {mathdoc},
     volume = {308},
     number = {5},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_308_5_a5/}
}