1. Conservative endodontic treatment of the open apex in three dimensions;Duell;Dent Glin North Am,1973
2. Endodontic endosseous implants and treatment of the wide open apex;Frank;Dent Clin North Am,1967
3. Endodontic therapy;Weine,1972
4. Experimental root apexification in primates;Steiner;Oral Surg,1971
5. Apical closure of nonvital teeth;Dylewski;Oral Surg,1971