%0 Journal Article %A N. J. Yurchuk %A Al-Momani Raid Rasheed %T A classical solution, weakened on the axis, of the centrally symmetric mixed problem for three-dimensional hyperbolic equations of even order %J Differencialʹnye uravneniâ %D 1998 %P 260-265 %V 34 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1998_34_2_a16/ %G ru %F DE_1998_34_2_a16