%0 Journal Article %A E. I. Ganzha %T Higher conservation laws of nonhomogeneous systems of hydrodynamic type %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 1996 %P 86-87 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_1996_1_a17/ %G ru %F VMUMM_1996_1_a17