TY - JOUR AU - E. V. Ferapontov TI - Conformally plane metrics, systems of hydrodynamic type, and non-local Hamiltonian operators JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1995 SP - 811 EP - 813 VL - 50 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RM_1995_50_4_a4/ LA - en ID - RM_1995_50_4_a4 ER -