1. Irradiation of Graphite at Liquid Helium Temperatures
2. Bacon, G. E. 1958. U.K.A.E.A. Report AERE-M/R 2702
3. Berman, R., Foster, E. L. and Rosenberg, H. M. Report Conf. Defects in Solids. London: The Physical Society.
4. Bochirol, L., Bonjour, E. and Weil, L. 1962. Venice Symposium on Radiation Damage. May1962.