A preliminary clinical trial using flowable glass-ionomer cement as a liner in proximal-ART restorations: the operator effect - Bonifácio, Clarissa-Calil; Hesse, Daniela; Bönecker, Marcelo José Strazzeri; Loveren, Cor Van; Amerongen, W. Evert Van; Raggio, Daniela-Prócida (Medicina Oral, Patología Oral y Cirurgía Bucal, 2013)