Dwi Setyana, L., M. . Mahardika, and suyitno suyitno. “Oblique Gate Direction During Centrifugal Casting in Artificial Lumbar Disc Model of CP-Ti”. Acta Metallurgica Slovaca, vol. 26, no. 3, Sept. 2020, pp. 132-7, doi:10.36547/ams.26.3.535.