E. Mabruri, I Nyoman Gede, and E. P. Utomo, “STUDI EQUAL CHANNEL ANGULAR PRESSING (ECAP) SUHU NITROGEN CAIR PADA PADUAN Al-Mg-Si (Al 6061) [A Study On Equal Channel Angular Pressing At Liquid Nitrogen Temperature Of Al – Mg – Si (Al 6061) Alloys]”, Metalurgi, vol. 29, no. 3, pp. 215–222, Dec. 2014.