%0 Journal Article %A S. Kalla %A N. Virchenko %A I. Alexandrovich %T Inverse Problems Involving Generalized Axial-Symmetric Helmholtz Equation %J Mathematica balkanica %D 2012 %P 113 %V 26 %N 1-2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MABA_2012_26_1-2_a10/ %F MABA_2012_26_1-2_a10