Wulandari, N., Erfiani, E., Irzaman, I. and Syafitri, U. (2023) “G-OPTIMAL DESIGN OF NON-LINEAR MODEL TO INCREASE PURITY LEVELS OF SILICON DIOXIDE”, BAREKENG: Jurnal Ilmu Matematika dan Terapan, 17(2), pp. 0659-0666. doi: 10.30598/barekengvol17iss2pp0659-0666.