1. 1. A. P. Mills Jr., Comments on Solid State Phys. 10, 173 (1983)
2. 2. Positron Solid State Physics, Proceedings of the 83rd Session of the International Summer School "Enrico Fermi" at Vanenna, Italy, 1981, W. Brandt and A. Dupasquier, eds. (Plenum, N.Y., 1983) - See contributions of K. G. Lynn and A. P. Mills, Jr.
3. A. P. Mills Jr., Appl. Phys. 23, 189 (1980).
4. A. P. Mills Jr., Science 218, 335 (1982).
5. L. D. Hulett, J. M. Dale and S. Pendyala, Surf. and Interface Analysis 2, 204 (1980).