%0 Journal Article %A F. E. Lomovtsev %T The Cauchy problem for complete second-order hyperbolic differential equations with variable domains of operator coefficients %J Differencialʹnye uravneniâ %D 2000 %P 542-548 %V 36 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2000_36_4_a14/ %G ru %F DE_2000_36_4_a14