1. Oral Development and Histology;Avery,1988
2. Incidence of two-root canals in human mandibular incisor teeth;Benjamin;Oral Surg,1974
3. Molar endodontic surgery;Cambruzzi;J Can Dent Assoc,1983
4. Microscopes in endodontics;Carr;J Calif Dent Assoc,1992
5. Pathways of the Pulp;Cohen,1994