1. La melanodontie infantile;Beltrami, G.; Romieu, M.;Rev. Stomat. (Paris),1939
2. On the use of pacifiers in preventing malocclusion;Gorelick, L.;N. Y. St. dent. J,1955
3. The problem of caries in child dental health;Hargreaves, J.A.;Brit. dent. J,1964
4. "Comforter" caries;Harries, E.H.R.;Lancet,1911
5. Erosive effect of drinking fluids on the molar teeth of the rat;Hartles, R.L.; Wagg, B.J.;Arch. oral Biol,1962