@article{SM_1981_40_3_a6,
     author = {A. A. Fonarev},
     title = {On the approximate construction of an implicit function},
     journal = {Sbornik. Mathematics},
     pages = {429--433},
     year = {1981},
     volume = {40},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1981_40_3_a6/}
}