%0 Journal Article %A Dollinger, Michael B. %A Oberai, Kirti K. %T On the spectrum of a linear operator %J Glasgow mathematical journal %D 1972 %P 98-101 %V 13 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500001476/ %R 10.1017/S0017089500001476 %F 10_1017_S0017089500001476