@article{FAA_1979_13_2_a16,
     author = {O. P. Shcherbak},
     title = {Conditions for the existence of a nondegenerate mapping with a given support},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {95},
     publisher = {mathdoc},
     volume = {13},
     number = {2},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1979_13_2_a16/}
}