Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MAT_1970_14_4_a2, author = {L. V. H\"ormander}, title = {On the index of pseudodifferential operators}, journal = {Matematika}, pages = {78--97}, publisher = {mathdoc}, volume = {14}, number = {4}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MAT_1970_14_4_a2/} }
L. V. Hörmander. On the index of pseudodifferential operators. Matematika, Tome 14 (1970) no. 4, pp. 78-97. http://geodesic.mathdoc.fr/item/MAT_1970_14_4_a2/