%0 Journal Article %A V. S. Rykhlov %T Classical solution of the initial-boundary value problem for the wave equation with mixed derivative %J Contemporary Mathematics. Fundamental Directions %D 2024 %P 451-486 %V 70 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMFD_2024_70_3_a8/ %G ru %F CMFD_2024_70_3_a8