%0 Journal Article %A M. G. Karatopraklieva %T On a Nonlocal Boundary Value Problem For an Equation of Mixed Type with Discontinuous Coefficients %J Mathematica balkanica %D 2001 %P 67 %V 15 %N 1-2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MABA_2001_15_1-2_a6/ %F MABA_2001_15_1-2_a6