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@article{DE_1993_29_10_a13, author = {M. B. Sheftel}, title = {Higher integrals and symmetries of {semi-Hamiltonian} systems}, journal = {Differencialʹnye uravneni\^a}, pages = {1782--1795}, publisher = {mathdoc}, volume = {29}, number = {10}, year = {1993}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1993_29_10_a13/} }
M. B. Sheftel. Higher integrals and symmetries of semi-Hamiltonian systems. Differencialʹnye uravneniâ, Tome 29 (1993) no. 10, pp. 1782-1795. http://geodesic.mathdoc.fr/item/DE_1993_29_10_a13/