“RANCANGAN HEAT EXCHANGER JENIS SHELL AND TUBE UNTUK PRODUKSI NANOPARTIKEL Fe3O4 SKALA INDUSTRI: DESIGN OF SHELL AND TUBE TYPE HEAT EXCHANGER FOR INDUSTRIAL SCALE Fe3O4 NANOPARTICLE PRODUCTION USING MATHEMATIC MODELING”. Fraction: Jurnal Teori dan Terapan Matematika 2, no. 2 (December 2, 2022): 46–52. Accessed November 1, 2025. https://fraction.ubb.ac.id/index.php/fraction/article/view/33.