Hossein Baghdadi, Amir, et al. “Effect of Travel Speed on Quality and Welding Efficiency of Friction Stir Welded AZ31B Magnesium Alloy”. International Journal of Engineering & Technology, vol. 7, no. 3.17, Aug. 2018, pp. 94-99, https://doi.org/10.14419/ijet.v7i3.17.16629.