1. Positron Solid-State Physics, Proc. S.I.F., Course LXXXIII edited byW. Brandt andA. Dupasquier (North-Holland, Amsterdam, New York, N. Y., Oxford, 1983).
2. Positron Annihilation, Proceedings of the V1 International Conference on Positron Annihilation, edited byR. R. Hasiguti andK. Fujiwara (Japan Institute of Metals, Sendai, 1979).
3. Positron Annihilation, edited byP. G. Coleman, L. M. Diana andS. L. Sharma (North-Holland, Amsterdam, New York, N. Y., Oxford, 1982).
4. Proceedings of the International Conference on Positron Scattering and Annihilation in Gases, Toronto, 1981, inCan J. Phys.,60, 456 (1982).
5. Positron Scattering in Gases, edited byJ. W. Humberston andM. R. C. McDowell (Plenum Press, New York, N. Y., London, 1984).