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Del Monte, Stefano; Afrashtehfar, Kelvin Ian; Emami, Elham; Abi Nader, Samer; Tamimi, Faleh (2017). Lay preferences for dentogingival esthetic parameters: A systematic review. The journal of prosthetic dentistry, 118(6), pp. 717-724. Elsevier 10.1016/j.prosdent.2017.04.032
