%0 Journal Article %A S. N. Kiyasov %T Some cases of the solvability in a~closed form of singular integral equations and two-dimensional characteristic systems %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 2011 %P 54-71 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_2011_4_a5/ %G ru %F IVM_2011_4_a5