1. Nightguard vital bleaching;Haywood;Quintessence Int,1989
2. Vital tooth bleaching: the White and Brite technique;Darnell;Compend Contin Educ Dent,1990
3. Nightguard vital bleaching: current information and research;Haywood;Esthet Dent Update,1990
4. Home bleaching;Albers;ADEPT report,1991
5. Home-use bleaching survey-1991;Christensen;CRA Newsletter,1991