%0 Journal Article %A Rakočević, Vladimir %T Approximate point spectrum and commuting compact perturbations %J Glasgow mathematical journal %D 1986 %P 193-198 %V 28 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500006509/ %R 10.1017/S0017089500006509 %F 10_1017_S0017089500006509