Arina, Faula, Aji Wigena, I Sumertajaya, and Utami Syafitri. 2022. “D-OPTIMAL DESIGNS FOR SPLIT-PLOT MIXTURE PROCESS VARIABLE DESIGNS OF THE STEEL SLAG EXPERIMENT”. BAREKENG: Jurnal Ilmu Matematika Dan Terapan 16 (1), 305-14. https://doi.org/10.30598/barekengvol16iss1pp303-312.