Greco, C. M.; Anfe, T. E. de A.; Caneppele, T. M. F.; Agra, C. M. Gingival Retraction: Thickness Measurement and Comparison of Different Cords. BDS 2015, 18 (2), 50-57. https://doi.org/10.14295/bds.2015.v18i2.1060.