@article{M2AN_1983__17_1_93_0,
     author = {Moszy\'nski, Krzysztof},
     title = {Approximation spectral d'un op\'erateur born\'e et normal \`a l'aide de ses fonctions de la densit\'e spectrale},
     journal = {RAIRO. Analyse num\'erique},
     pages = {93--109},
     publisher = {Centrale des revues, Dunod-Gauthier-Villars},
     address = {Montreuil},
     volume = {17},
     number = {1},
     year = {1983},
     mrnumber = {695453},
     zbl = {0523.65041},
     language = {fr},
     url = {http://www.numdam.org/item/M2AN_1983__17_1_93_0/}
}