Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MAT_1963_7_1_a2, author = {J. Peetre}, title = {Another approach to elliptic boundary problems}, journal = {Matematika}, pages = {43--65}, publisher = {mathdoc}, volume = {7}, number = {1}, year = {1963}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MAT_1963_7_1_a2/} }
J. Peetre. Another approach to elliptic boundary problems. Matematika, Tome 7 (1963) no. 1, pp. 43-65. http://geodesic.mathdoc.fr/item/MAT_1963_7_1_a2/