%0 Journal Article %A Ismailov, Zameddin I. %A Ipek, Pembe %T Selfadjoint singular differential operators of first order and their spectrum %J Electronic Journal of Differential Equations %D 2016 %V 2016 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2016__2016__a33/ %G en %F EJDE_2016__2016__a33