?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Thohiroh%2C+Azizah&rft.aufirst=Azizah&rft.aulast=Thohiroh&rft.date=2025&rft.title=Optimasi+Portofolio+Menggunakan+Metode+Mean-Variance+dengan+L1-Regularization+Saham+Jakarta+Islamic+Index+(JII)&rft.inst=Universitas+Negeri+Padang&rft.degree=Bachelor%2FSkripsi