Nerli Khairani; Lubis, C. R. M.; Simanjuntak, D. E.; Aritonang, F. N. .; Turnip, R. Diet Package Profit Optimization of a Fitness Center Using the Simplex Method and POM-QM Software. j. of artif. intell. and eng. appl. 2026, 5, 4641-4645.