Mazaheri, R. et al. 2019. Comparing the Effect of Topical Acidulated Phosphate Fluoride on Micro- Hardness of Two Fissure Sealants and One Flowable Composite. Journal of Dental School. 32, 2 (Mar. 2019), 103–110. DOI:https://doi.org/10.22037/jds.v32i2.24804.