@article{GDZPPN002484994, title = {The Projection Theorem for Spectral Sets.}, journal = {Monatshefte f\"ur Mathematik}, volume = {102}, year = {1986}, pages = {1-10}, language = {en}, url = {http://dml.mathdoc.fr/item/GDZPPN002484994} }
Bekka, Mohammed El Bachir. The Projection Theorem for Spectral Sets.. Monatshefte für Mathematik, Tome 102 (1986) pp. 1-10. http://gdmltest.u-ga.fr/item/GDZPPN002484994/