M.N. Mohammed, M.Z. Omar, J. Syarif, Z. Sajuri, M.S. Salleh, and K.S. Alhawari. “Investigations on Thixojoining Process of Steel Components”. Journal of Mechanical Engineering and Sciences, vol. 5, no. 1, Dec. 2013, pp. 639-45, doi:10.15282/jmes.5.2013.10.0061.