TY - JOUR AU - Hakobyan, G. O. AU - Margaryan, V. N. TI - Gevrey hypoellipticity for a class of degenerated quasi-elliptic operators JO - Commentationes Mathematicae Universitatis Carolinae PY - 2003 SP - 637 EP - 644 VL - 44 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMUC_2003__44_4_a7/ LA - en ID - CMUC_2003__44_4_a7 ER -