1. Principles and practice of endodontics;Walton,1989
2. Prognosis of intracoronal bleaching with sodium perborate preparations in vitro: 1-year study;Rotstein;J Endodon,1993
3. A new combination for bleaching teeth;Nutting;J South Calif Dent Assoc,1963
4. Perborate as a bleaching agent;Salvas;J Am Dent Assoc,1938
5. A simple bleaching technique using sodium perborate;Spasser;NY State Dent J,1961