1.
Yuliandra B, Hasan A, Rezeki R. Portofolio Optimal dan Pengelompokan Perusahaan Berdasarkan Pengaruh Komoditas Dunia. J. Optimasi Sist. Ind. [Internet]. 2017 May 26 [cited 2024 May 2];16(1):50-7. Available from: https://josi.ft.unand.ac.id/index.php/josi/article/view/102