%0 Journal Article %A Saboormaleki, M. %T On the spectrum of non-selfadjoint differential operators. %J International Journal of Open Problems in Computer Science and Mathematics. IJOPCM %D 2008 %P 240 %V 1 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/IJOPCM_2008__1_3_228476/ %G en %F IJOPCM_2008__1_3_228476