@article{LJM_1999_3_a11, author = {R. Miyaoka}, title = {Hypersurface geometry and hamiltonian systems of hydrodynamic type}, journal = {Lobachevskii journal of mathematics}, pages = {209--220}, year = {1999}, volume = {3}, language = {en}, url = {http://geodesic.mathdoc.fr/item/LJM_1999_3_a11/} }