Kugel G, Perry RD, Hoang E, et al.
Effective tooth bleaching in 5 days: using a combined in-office and at-home bleaching system.
Compend Contin Educ Dent (United States), Apr 1997, 18(4) p378, 380-3 

Goldstein RE
In-office bleaching: where we came from, where we are today.
J Am Dent Assoc (United States), Apr 1997, 128 Suppl p11S-15S

Tooth bleaching using peroxide-containing agents: current status of safety issues.
Compend Contin Educ Dent (United States), Aug 1998, 19(8) p783-6, 788, 790, passim; quiz 796 

Clark DM, Hintz J
Case report: in-office tooth whitening procedure with 35% carbamide peroxide evaluated by the Minolta CR-321 Chroma Meter.
J Esthet Dent (Canada), 1998, 10(1) p37-42 

Radz GM
In-office bleaching system for quick esthetic change.
Compend Contin Educ Dent (United States), Oct 1999, 20(10) p986-90