%0 Journal Article %A Su, Yucai %T Poisson Brackets and Structure of Nongraded Hamiltonian Lie Algebras Related to Locally-Finite Derivations %J Canadian journal of mathematics %D 2003 %P 856-896 %V 55 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-2003-036-7/ %R 10.4153/CJM-2003-036-7 %F 10_4153_CJM_2003_036_7