1. Nightguard vital bleaching;Haywood;Quintessence Int,1989
2. Effectiveness, side effects and long-term status of nightguard vital bleaching;Haywood;JADA,1994
3. The effects of bleaching application time on the dental pulp;Schulte;JADA,1994
4. Risk factors for developing tooth sensitivity and gingival irritation associated with night-guard vital bleaching;Leonard;Quintessence Int,1997
5. Clinical trial of three 10 percent carbamide peroxide bleaching products;Tam;J Can Dent Assoc,1999