Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MOMA_1986__101_178259, author = {Mohammed El Bachir Bekka}, title = {The {Projection} {Theorem} for {Spectral} {Sets.}}, journal = {Monatshefte f\"ur Mathematik}, pages = {1--10}, publisher = {mathdoc}, volume = {101}, year = {1986}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MOMA_1986__101_178259/} }
Mohammed El Bachir Bekka. The Projection Theorem for Spectral Sets.. Monatshefte für Mathematik, Tome 101 (1986), pp. 1-10. http://geodesic.mathdoc.fr/item/MOMA_1986__101_178259/