“The Influence of Cement Spacer Thickness on Retentive Strength of Monolithic Zirconia Crowns Cemented with Different Luting Agents (A Comparative in-vitro Study)”, Indian Journal of Forensic Medicine & Toxicology, vol. 15, no. 1, pp. 2246–2252, Dec. 2020, doi: 10.37506/ijfmt.v15i1.13737.