MADA, D. C. .; GASPARIK, C. .; MOLDOVAN, M. .; MIRON-BORZAN, C. S.; IRIMIE, A. I. .; CORNEA, D. .; DUDEA, D. .; CÂMPIAN, R. S. 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 UBB Chemia 2016, 61, 43-52.