Arina, F., Wigena, A., Sumertajaya, I. and Syafitri, U. (2022) “D-OPTIMAL DESIGNS FOR SPLIT-PLOT MIXTURE PROCESS VARIABLE DESIGNS OF THE STEEL SLAG EXPERIMENT”, BAREKENG: Jurnal Ilmu Matematika dan Terapan, 16(1), pp. 305-314. doi: 10.30598/barekengvol16iss1pp303-312.