Khasanah, Nur, Nikken Prima Puspita, Fitriana Hasnani, Meryta Febrilian Fatimah, and Zakaria Bani Ikhtiyar. 2026. “LEONTIEF MATRIX: BUSINESS MODEL RECOMMENDATION FOR EXPORT COMMODITY OF NORTH SUMATERA”. Jurnal Matematika UNAND 15 (1):95-107. https://doi.org/10.25077/jmua.15.1.95-107.2026.