1. Nightguard vital bleaching;Haywood;Quintessence Int,1989
2. History, safety, and effectiveness of current bleaching techniques and applications of the nightguard vital bleaching technique;Haywood;Quintessence Int,1992
3. Consideration and variations of dentist-prescribed, home-applied vital tooth-bleaching techniques;Haywood;Compendium,1994
4. Salivary pH changes during 10% carbamide peroxide bleaching;Leonard;Quintessence Int,1994
5. Use of different concentrations of carbamide peroxide for bleaching teeth: an in vitro study;Leonard;Quintessence Int,1998