%0 Journal Article %A N. Tarkhanov %T Unitary Solutions of Partial Differential Equations %J Mathematica balkanica %D 2006 %P 73 %V 20 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MABA_2006_20_1_a5/ %F MABA_2006_20_1_a5