%0 Journal Article %A S. V. Zhestkov %T The Unique Solvability of the Doubly Periodic Problem for a System of Nonlinear Telegraph Partial Differential Equations %J Differencialʹnye uravneniâ %D 2001 %P 223-227 %V 37 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2001_37_2_a9/ %G ru %F DE_2001_37_2_a9