Al-Joboury, Ahmed I, et al. “An Evaluation of the Influence of Different Finishing Lines on the Fracture Strength of Full Contour Zirconia CAD CAM and Heat Press All-Ceramic Crowns ”. Journal of Baghdad College of Dentistry, vol. 27, no. 1, Mar. 2015, pp. 54-62, https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/635.