NAMJOU, Alireza, et al. “A Comparative Study on Direct and Pulsed Current Gas Tungsten Arc Welding of 25Cr-35Ni Heat Resistant Steel”. International Journal of Natural and Engineering Sciences, vol. 8, no. 3, June 2019, pp. 22-28, https://www.ijnes.org/index.php/ijnes/article/view/214.