1. Bambusi D (2004) Semiclassical normal forms. In: Multiscale Methods in Quantum Mechanics, pp. 23–39. Trends in Mathematics. Boston, MA: Birkhäuser.
2. Normal forms and quantization formulae;Bambusi;Communications in Mathematical Physics,1999
3. Heisenberg’s picture and noncommutative geometry of the semiclassical limit in quantum mechanics;Bellissard;Annales de l’Institut Henri Poincare´. Physique The´orique,1990
4. Quasi Modes sur les variétés Riemanniennes;Colin de Verdière;Inventiones Mathematichaes,1977
5. The Schrödinger equation and canonical perturbation theory;Graffi;Communications in Mathematical Physics,1987