1. Solid carbon dioxide in a natural diamond
2. I.L. Chinn, PHD dissertation, University of Cape Town (1995).
3. T. Hainschwang, DUG dissertation, University of Nantes, France, (2003).
4. F. Notari, T. Hainschwang, E. Fritsch, L. Massi, C.M Breeding, B. Rondeau, Gems. gemol. (in press).