Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1979_15_2_a14, author = {B.-W. Schulze}, title = {Over- and under-determined elliptic boundary value problems}, journal = {Differencialʹnye uravneni\^a}, pages = {321--326}, publisher = {mathdoc}, volume = {15}, number = {2}, year = {1979}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1979_15_2_a14/} }
B.-W. Schulze. Over- and under-determined elliptic boundary value problems. Differencialʹnye uravneniâ, Tome 15 (1979) no. 2, pp. 321-326. http://geodesic.mathdoc.fr/item/DE_1979_15_2_a14/