1. Howell, F. A., Nutting, E. B., Zeigler, P. E., and Schmidt, R. E.: Personal Communications, 1971, 1972, 1973.
2. Experimental Studies on Reattachment;Björn;Dent. Pract,1942
3. Tissue Regeneration in Patients With Periodontal Disease;Björn;Odontol. Revy,1965
4. Reaction of Rat Tissue to Implant Root Ends;Boulger;J. Am. Dent. Assoc,1931
5. Healing of Disturbed and Undisturbed Extraction Wounds;Claflin;J. Am. Dent. Assoc,1938