1. G. Laricchia, Positron spectroscopy of solids, in: A. Dupasquier, A.P. Mills (Eds.), Proceedings of the International School of Physics “Enrico Fermi” Course CXXV, IOS Press, Amsterdam, 1995, p. 401
2. Positronium-Argon Scattering
3. Positronium-beam production and positronium scattering from molecular hydrogen
4. Ps beam production and scattering from gaseous targets
5. A.J. Garner, G. Laricchia, A. Özen, 1997, in preparation