A. F. Albo Hassan and N. . . H. Ghaib, “The impact of various staining substances and immersion time on the stainability of bonded sapphire brackets with three kinds of light cure orthodontic adhesives (An in-vitro study)”, J Bagh Coll Dent, vol. 32, no. 3, pp. 1–7, Sep. 2020, doi: 10.26477/jbcd.v32i3.2893.