1. Bonded resin sealant for smooth surface enamel defects: new concepts in “micro-restorative” dentistry;Croll;Quintessence Int,1987
2. Enamel color modification by controlled hydrochloric acid-pumice abrasion. I. technique and examples;Croll;Quintessence Int,1986
3. Enamel color modification by controlled hydrochloric acid-pumice abrasion. II. further examples;Croll;Quintessence Int,1986
4. Hydrochloric acid- pumice enamel surface abrasion for color modification: results after six months;Croll;Quintessence Int,1986
5. Enamel color improvement: all things considered;Croll;Quintessence Int,1986