Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1966_166_6_a11, author = {A. B. Shabat}, title = {An analog of the {Rado--Cartan} theorem for solutions of elliptic equations}, journal = {Doklady Akademii Nauk}, pages = {1304--1307}, publisher = {mathdoc}, volume = {166}, number = {6}, year = {1966}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1966_166_6_a11/} }
A. B. Shabat. An analog of the Rado--Cartan theorem for solutions of elliptic equations. Doklady Akademii Nauk, Tome 166 (1966) no. 6, pp. 1304-1307. http://geodesic.mathdoc.fr/item/DAN_1966_166_6_a11/