1. Handbook of Raman Spectroscopy: From Research Laboratory to the Process Line;Edwards,2001
2. S. O’Connor, in: Archaeological Bone, Antler, Ivory, UK, Institute for Conservation, Occasional Paper, No. 5, 1987, p. 9.
3. O. Krzyszkowska, in: Classical Handbook 3: Ivory and Related Materials, Institute of Classical Studies Bulletin, Supplement 59.
4. T.K. Penniman, in: Pictures of Ivory and Other Animal Teeth, Occasional Papers on Technology 5, Pitt Rivers Museum, University of Oxford, 1952.
5. Identification Guide for Ivory and Ivory Substitutes;Espinoza,1992