%0 Journal Article %A R. G. Barantsev %T A mixed problem for equation $\psi_{\sigma\sigma}-K(\sigma)\psi_{\theta\theta}=0$ with Cauchy data given on curve $\theta=s(\sigma)$ %J Doklady Akademii Nauk %D 1957 %P 919-922 %V 114 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1957_114_5_a0/ %G ru %F DAN_1957_114_5_a0