1. P. G. Burke, P. Francken and C. J. Joachain, Europhys. Lett. 13, 617 (1990)
2. P. G. Burke, P. Francken and C. J. Joachain, J. Phys. B 24, 761 (1991) “R-matrix-Floquet theory of multiphoton processes” (RMF 1)
3. Some of these ongoing studies are presented in the contributions of M. LeDourneuf and of K.A. Berrington to this conference.
4. A. Giusti-Suzor and P. Zoller, Phys. Rev. A 36, 5178 (1987);
5. L. Dimou and F.H.M. Faisal, Phys. Rev. Lett.
59, 872 (1987);