%0 Journal Article %A E. L. Patsevich %T Construction of the Schwarz operator in a~circular countably connected $\sigma$-domain by the symmetry method %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1986 %P 67-76 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1986_10_a7/ %G ru %F IVM_1986_10_a7