1. J. Levert, F. Mess, L. Grote, D. Mykola, L. Cook and S. Danyluk, Proc. International Tribology Conf., Yokohama Japan 1995.
2. L. Cook, J. Non-Crystalline Solids 120, 152 (1990).
3. J. Levert, R. Baker, F. Mess, R. Salant and S. Danyluk, Proc. Annual Mtg. of the Society of Tribologists and Lubrication Engineers, London, 1997.
4. Z. Stavreva, D. Zeidler, M. Plotner and K. Drescher, Appl. Surf. Sci. 108, 39 (1997).
5. A. Iqbal and R. Sudipto, R., Solid State Techn. June, 185 (1997).