1. O. Fejerskov, E.A. Kidd, O.L.E. Fejerskov, E.A. Kidd, Dental Caries (Blackwell Munksgaard, Copenhagen, 2003)
2. J.D. Featherstone, Community Dent. Oral 27, 31 (1999)
3. S.C. White, M.J. Pharoah, Oral Radiology: Principles and Interpretation (Elsevier, Philadelphia, 2014)
4. J.D. Bader, D.A. Shugars, A.J. Bonito, J. Public Health Dent. 62, 201 (2002)
5. D. Fried, C.M. Bühler, P. Ngaotheppitak, C.L. Darling, Proc. J. Biomed. Opt. 6137, 61370L (2006)