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Robiyanto, Robiyanto.
" Penggunaan Metode Orthogonal GARCH untuk Meramalkan Matriks Kovarians Return Indeks Harga Saham Sektoral Di Bursa Efek Indonesia." <em>Jurnal Ekonomi Kuantitatif Terapan</em> [Online], (2019): 167-174. Web.  6 Sep. 2026