Bahadur, Y. R., Agarwal, D. K., Gupta, A., & Prasad, P. N. (2016). Frictional Resistance in Various Ceramic Brackets using Archwires of different Alloys, Sizes and Cross sections: A Comparative Study. Orthodontic Journal of Nepal, 6(1), 18–22. https://doi.org/10.3126/ojn.v6i1.16174