TY - JOUR AU - S. G. Gindikin TI - A certain class of differential operators that admit a two-sided energy estimate JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1973 VL - 28 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RM_1973_28_6_a14/ LA - ru ID - RM_1973_28_6_a14 ER -