(70.5): E.F. Worden, R.G. Gutmacher, R.W. Loughed, J.G. Conway and R.J. Mehlhorn, J. opt. Soc. Am., 1970, 60, 1297-302.

(71.1): L. Brewer, J. opt. Soc. Am., 1971, 61, 1101-11.

(74.5): E.F. Worden, R.W. Loughed, R.G. Gutmacher and J.G. Conway, J. opt. Soc. Am., 1974, 64, 77-85.

(75.2): L.S. Goodman, H. Diamond and H.E. Stanton, Phys. Rev. A, U.S.A., 1975, 11, 499-504.

(80.4): J. Blaise, J.F. Wyart, J.G. Conway and E.F. Worden, Physica Scripta, Sweden, 1980, 22, 224-30.

(unp.9): J. Blaise and J.F. Wyart.

(unp.17): H. Crosswhite and H.M. Crosswhite.