Forghani, Farshid Reza, et al. “Cytotoxicity of Two Resin-Based Sealers and a Fluoride Varnish on Human Gingival Fibroblasts”. Iranian Endodontic Journal, vol. 10, no. 2, Mar. 2015, pp. 89-92, doi:10.22037/iej.v10i2.8485.