@article{ASENS_1965_3_82_2_297_0, author = {Akutowicz, Edwin J.}, title = {Sur l'approximation spectrale}, journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure}, pages = {297--325}, publisher = {Elsevier}, volume = {3e s{\'e}rie, 82}, number = {2}, year = {1965}, doi = {10.24033/asens.1142}, zbl = {0166.39902}, mrnumber = {35 #5863}, language = {fr}, url = {http://archive.numdam.org/articles/10.24033/asens.1142/} }