1. Standardized intraoral roentgenograms versus free hand projections;Benkow;Norske Tannlægeforen. Tid.,1968
2. News about the film holder according to Dr. Eggen;Benkow;Norske Tannlægeforen. Tid.,1971
3. Autotransplantation of premolars;Bjercke,1967
4. Transplant of left biscuspid to right side: Case report;Cook;J. Am. Dent. Assoc.,1962
5. Autogenous transplantation of tooth germs into the upper incisor region;Dixon;Br. Dent. J.,1971