Bihamiltonian systems in the quantum-classical transition Marmo, G.; Simoni, A.; Ventriglia, F. — 2002 Proceedings of the 21st Winter School "Geometry and Physics"
Symmetries and constants of the motion for dynamics in implicit form G. Marmo; G. Mendella; W. M. Tulczyjew — 1992 Annales de l'I.H.P. Physique théorique