1. Root canal therapy in nonvital teeth with open apices;Cooke;Br Dent J,1960
2. The role of the blood clot in endodontic therapy;Östby;Acta Odontol Scand,1961
3. Apical root formation in a non-vital immature permanent incisor;Ball;Br Dent J,1964
4. Therapy for the divergent pulpless tooth by continued apical formation;Frank;JADA,1966
5. Root growth and apical repair subsequent to pulpal necrosis in children;Rule;Br Dent J,1966