@article{PSMIR_1975___S3_A9_0,
     author = {Rappaz, J.},
     title = {Approximation du spectre d'un op\'erateur non compact},
     journal = {Publications des s\'eminaires de math\'ematiques et informatique de Rennes},
     eid = {9},
     pages = {1--16},
     publisher = {D\'epartement de Math\'ematiques et Informatique, Universit\'e de Rennes},
     number = {S3},
     year = {1975},
     language = {fr},
     url = {http://www.numdam.org/item/PSMIR_1975___S3_A9_0/}
}