Lv. Bogdanov et Ev. Ferapontov, A NONLOCAL HAMILTONIAN-FORMALISM FOR SEMI-HAMILTONIAN SYSTEMS OF THE HYDRODYNAMIC TYPE, Theoretical and mathematical physics, 116(1), 1998, pp. 829-835
A nonlocal Hamiltonian formalism for semi-Hamiltonian systems of the h
ydrodynamic type is constructed using the formal Baker-Akhiezer functi
ons for a (2 + 1)-dimensional n-wave system.