1. V. Guillemin and S. Sternberg. “Symplectic Techniques in Physics,” Cambridge University Press, Cambridge (1984).
2. L. Fleury, A. Zumbusch, M. Orrit, R. Brown and J. Bernard, J. Luminescence 56:15 (1993).
3. W. E. Moerner, T. Plakhotnik, T. Irngartinger, M. Croci, V. Palm and U. P. Wild, J. Phys. Chem. 98:7382 (1994).
4. M. Pirotta, F. Güttler, H.-R. Gygax, A. Renn, J. Sepiol and U. P. Wild, Chem. Phys. Lett. 208:379 (1993).
5. U. P. Wild, M. Croci, F. Güttler, M. Pirotta and A. Renn, J. Luminescence 60 &61:1003 (1994).