@article{DAN_1973_209_5_a11,
     author = {E. B. Gledzer},
     title = {System of hydrodynamic type admitting two quadratic integrals of motion},
     journal = {Doklady Akademii Nauk},
     pages = {1046--1048},
     publisher = {mathdoc},
     volume = {209},
     number = {5},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_209_5_a11/}
}