1. A preliminary report of investigation of apical root resorption of permanent teeth;Ketcham;Int J Orthod,1927
2. Initial tissue behavior during apical root resorption;Reitan;Angle Orthod,1974
3. A study of human root cementum surfaces as prepared for and examined in the SEM;Jones;Z Zellforsch Mikrosk Anat,1972
4. SEM of human premolars following experimental tooth movement;Kvam;Trans Eur Orthod Soc,1972
5. SEM of tissue changes on the pressure surface of human premolars following tooth movement;Kvam;Scand J Dent Res,1972