Alim, Khairul, et al. “Formation of Optimal Portfolio on JII Stock Using Sharpe, Treynor, and Jensen Indices During the Period of 2018-2023”. Jurnal Matematika, Statistika Dan Komputasi, vol. 19, no. 3, May 2023, pp. 593-01, doi:10.20956/j.v19i3.26354.