%0 Journal Article %A E. V. Ferapontov %T Differential geometry of nonlocal Hamiltonian operators of hydrodynamic type %J Funkcionalʹnyj analiz i ego priloženiâ %D 1991 %P 37-49 %V 25 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1991_25_3_a4/ %G ru %F FAA_1991_25_3_a4