%0 Journal Article %A S. Gegovska-Zajkova %A B. Jovanovic %T Two-Dimensional Spectral Problems Containing Delta Distribution or Conjugation Conditions %J Mathematica balkanica %D 2004 %P 287 %V 18 %N 3-4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MABA_2004_18_3-4_a7/ %F MABA_2004_18_3-4_a7