%0 Journal Article %A V. A. Eleev %A V. N. Lesev %T On two boundary value problems for mixed equations with perpendicular lines of type change %J Vladikavkazskij matematičeskij žurnal %D 2001 %P 9-22 %V 3 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMJ_2001_3_4_a1/ %G ru %F VMJ_2001_3_4_a1