Al-Najjar, T. M., & Ali, F. A. (2013). Shear bond strength of stainless steel brackets bonded to porcelain surface treated with 1.23% acidulated phosphate fluoride gel compared to hydro fluoric acid with silane coupling agent (In vitro comparative study). Journal of Baghdad College of Dentistry, 25(Special Is), 167-173. https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/218