1. Marketing: using the fear factor;Stroup;Newsweek,2003
2. The development of periodontal plastic surgery;Miller;Periodontol 2000,1996
3. Surgical crown lengthening for function and esthetics;Allen;Dent Clin North Am,1993
4. Aesthetic crown lengthening;Jorgensen;Periodontol 2000,2001
5. Crown lengthening to facilitate restorative treatment in the presence of incomplete passive eruption;Hempton;J Mass Dent Soc,1999