1. Practically all the topics in this area have been reviewed in the recent year volumes of Advances in Chem. Phys. (Wiley-Interscience, New York
2. On the vibrational excited state generated in molecules by infra-red absorption of coherent light
3. Phonon coherent states in transient phenomena
4. Quantum Mechanics and Path Integrals;Feynman,1965
5. Phonons and Phonons Interactions,1964