El-Mahdy, Manar Ahmed, et al. “In Vitro Evaluation of Marginal Fit of Zirconia-Reinforced Lithium Silicate Laminate Veneers at Two Thicknesses Using Different CAD CAM Systems”. Brazilian Dental Science, vol. 23, no. 4, Sept. 2020, p. 9p, doi:10.14295/bds.2020.v23i4.2071.