%0 Journal Article %A V. I. Kas'yanov %T Rational approximation of integrals of Cauchy type and approximate solution of the Riemann problem for a~half plane %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1980 %P 50-55 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1980_11_a7/ %G ru %F IVM_1980_11_a7