Dzanurrahmana Zein F, Aimmatul Umah K, Asyaria K, Herianingrum S, Syifaul Qulub A, Alif Rusmita S. Optimization of ISSI Stock Portfolio using Single Index Models in 2013-2017. KSS [Internet]. 2019 Mar. 31 [cited 2025 Oct. 11];3(13):346–361. Available from: https://knepublishing.com/index.php/KnE-Social/article/view/4215