1. Brief history of root-canal therapy in the United States;Bowman;JADA,1945
2. The foreign body reaction of rat tissue and human tissue to gutta-percha;Boulger;JADA,1933
3. Effect of guttapercha, silver points and Rickert's root sealer on bone healing;Hunter;J Can Dent Assoc,1957
4. Root-canal filling materials;Puterbaugh;Int Dent Cong (seventh) Trans,1926
5. The chemistry of dental materials;Gibson,1922