TY - JOUR AU - N. M. Ivochkina TI - From GÄrding's cones to $p$-convex hypersurfaces JO - Contemporary Mathematics. Fundamental Directions PY - 2012 SP - 94 EP - 104 VL - 45 UR - http://geodesic.mathdoc.fr/item/CMFD_2012_45_a6/ LA - ru ID - CMFD_2012_45_a6 ER -