1. Dens in dente;Gustafson;Br Dent J,1950
2. Dens in dente;Kronfeld;J Dent Res,1934
3. Dens invaginatus. A micro-radiographical, histological and micro X-ray diffraction study;Omnell;Acta Odontol Scand,1960
4. Three coronal invaginations in a dilated composite odontome;Hitchin;Br Dent J,1954