1. F.P. Bundy, H.M. Strong, and R.H. Wentorf Jr, Chem. Phys. Carbon 10, 213 (1973).
2. H.O. Pierson, Handbook of Carbon, Graphite, Diamond and Fullerenes: Properties, Processing and Applications (Saddle River, NJ: Noyes Publications, 1993).
3. F.P. Bundy, Nature 176, 51 (1955).
4. H. Liander, ASEA J. 28, 97 (1955).
5. H.P. Bovenkerk, Nature 184, 1094 (1959).