%0 Journal Article %A V. I. Korzyuk %A J. V. Rudzko %T Curvilinear parallelogram identity and mean-value property for a semilinear hyperbolic equation of the second order %J Eurasian mathematical journal %D 2024 %P 61-74 %V 15 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/EMJ_2024_15_2_a4/ %G en %F EMJ_2024_15_2_a4