Bahri S, Tobing CS. OPTIMIZATION MODELING OF BIOGAS PRODUCTION PERFORMANCE FROM COW MANURE AND SUGARCANE TOPS USING THE GAUSS-NEWTON METHOD. Jurnal Matematika UNAND [Internet]. 2026 Oct. 20 [cited 2026 Oct. 21];15(4):466-80. Available from: https://jmua.fmipa.unand.ac.id/index.php/jmua/article/view/1766