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@article{MZM_1991_50_5_a13, author = {E. V. Ferapontov}, title = {Equations of hydrodynamic type from the point of view of the theory of webs}, journal = {Matemati\v{c}eskie zametki}, pages = {97--108}, publisher = {mathdoc}, volume = {50}, number = {5}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1991_50_5_a13/} }
E. V. Ferapontov. Equations of hydrodynamic type from the point of view of the theory of webs. Matematičeskie zametki, Tome 50 (1991) no. 5, pp. 97-108. http://geodesic.mathdoc.fr/item/MZM_1991_50_5_a13/