TY - JOUR AU - L. G. Khazin TI - Energy integrals of hyperbolic systems with constant coefficients JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1965 VL - 20 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RM_1965_20_2_a16/ LA - ru ID - RM_1965_20_2_a16 ER -