%0 Journal Article %A M. F. Mugafarov %T The Maximum Principle for a Hyperbolic Grid System and Its Applications %J Differencialʹnye uravneniâ %D 2003 %P 1137-1139 %V 39 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2003_39_8_a15/ %G ru %F DE_2003_39_8_a15