1. The interrelationship of endodontics and periodontics;Seltzer,1971
2. The perio-endo question: differential diagnosis;Harrington;Dent Clin North Am,1979
3. Periodontal-endodontic treatment;Simon,1984
4. Histopathology of the pulp in instances of periodontal disease;Sauerwein;Dentabs,1956
5. The influence of periodontal disease on the dental pulp;Mazur;Oral Surg Oral Med Oral Pathol,1964