MADA, D.C. et al. 2016. THE EFFECT OF A NATURAL EXTRACT-BASED EXPERIMENTAL BLEACHING GEL UPON THE COLOUR AND SURFACE ROUGHNESS OF A COMPOSITE RESIN - AN IN VITRO STUDY. Studia Universitatis Babeș-Bolyai Chemia. 61, 4 (Dec. 2016), 43–52.