(63.4): A. Giacchetti, J. opt. Soc. Am., 1963, 53, 506-7.

(66.1): A. Giacchetti, J. opt. Soc. Am., 1966, 56, 653-7.

(68.2): E.W.T. Richards, I. Stephen and H.S. Wise, Spectrochim. Acta B, GB, 1968, 23, 635-42.

(70.9): A. Giacchetti and J. Blaise, 2nd Conf. Europ. Group Atomic Spectrosc., Hannover, Dtsch, 1970, 56.

(85.4): J. Blaise, A. Ginibre and J.F. Wyart, Z. Phys. A, Dtsch., 1985, 321, 61-3.

(unp.5): J. Blaise and J.F. Wyart.

(unp.10): J. Blaise, J. Vergès and J.F. Wyart.