Suriyanto Bakri, et al. “Effect of Drum Rotation Speed on Magnetic Separation Efficiency for Iron Grade Improvement of Galesong Beach Iron Sand Takalar Regency”. Cognitia : International Engineering Journal, vol. 1, no. 2, Aug. 2025, pp. 77-83, https://doi.org/10.63288/ciej.v1i2.9.