%0 Journal Article %A E. V. Ferapontov %T Conformally plane metrics, systems of hydrodynamic type, and non-local Hamiltonian operators %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1995 %P 811-813 %V 50 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1995_50_4_a4/ %G en %F RM_1995_50_4_a4