1. Etch pits and trigons on diamond: I
2. S. Tolansky, The Microstructure of Diamond, NAG Press, London, 1955
3. S. Tolansky, in: R. Berman (Ed.), Physical Properties of Diamond, Clarendon Press, Oxford, 1965, p. 135
4. F.C. Frank, A.R. Lang, in: R. Berman (Ed.), Physical Properties of Diamond, Clarendon Press, UK, 1965, p. 140
5. Dislocations in diamond and the origin of trigones