Lattices and Choquet's theorem
In: Journal of Functional Analysis, Jg. 1974, S. 377-387The Lie algebra structure of degenerate Hamiltonian and Bi-Hamiltonian systems
In: Progress of Theoretical Physics, Jg. 1982, S. 1082-1104The Lie algebra structure of nonlinear evolution equations admitting infinite dimensional abelian symmetry groups
In: Progress of Theoretical Physics, Jg. 1981, S. 861-876Linear aspects in the theory of solitons and nonlinear integrable equations
In: Journal of the Physical Society of Japan, Jg. 1991, S. 1473-1496