%0 Journal Article %A V. S. Rykhlov %T The uniqueness of the solution of an initial boundary value problem for a hyperbolic equation with a mixed derivative and~a~formula for~the~solution %J Izvestiya of Saratov University. Mathematics. Mechanics. Informatics %D 2023 %P 183-194 %V 23 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/ISU_2023_23_2_a3/ %G ru %F ISU_2023_23_2_a3