%0 Journal Article %A A. N. Zarubin %T An Initial-Boundary Value Problem for a Difference-Differential Tricomi Equation in an Unbounded Domain %J Differencialʹnye uravneniâ %D 2003 %P 715-717 %V 39 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2003_39_5_a13/ %G ru %F DE_2003_39_5_a13