Am I References

(49.3): F.S. Tomkins and M. Fred, J.opt. Soc. Am., 1949, 39, 357-63.

(57.1): M. Fred and F.S. Tomkins, J. opt. Soc. Am., 1957, 47, 1076-87.

(60.7): R. Marrus, W.A. Nierenberg and J. Winocur, Phys. Rev., U.S.A., 1960, 120, 1429-35.

(61.2): K. Krebs and R. Winkler, Z. Physik, Dtsch., 1961, 162, 235-44.

(66.5): L. Armstrong Jr and R. Marrus, Phys. Rev., U.S.A., 1966, 144, 994-8.

(80.4): J. Blaise, J.F. Wyart, J.G. Conway and E.F. Worden, Physica Scripta, Sweden, 1989, 22, 224-30.

(83.6): B.V. Pulliam, Symp. on Atomic Spectr., Spt. 1983, Berkeley, U.S.A.

(unp.9): J. Blaise, J.-F. Wyart.

(unp.25): B.V. Pulliam.