Simbolon HY, Sawaluddin, Ramli M. Quadratic Programming Approach in the Non-Negatif Matrix Factorization. J. of Maths Tech and Edu [Internet]. 2023Dec.24 [cited 2024Dec.22];2(2):150-6. Available from: https://talenta.usu.ac.id/jomte/article/view/15670