Husodo, Zaafri, Sigit Wibowo, Muhammad Prasetyo, Usman Arief, and Maulana Muhajir. “ESTIMATING A JOINT PROBABILITY OF DEFAULT INDEX FOR INDONESIAN BANKS: A COPULA APPROACH”. Buletin Ekonomi Moneter dan Perbankan 23, no. 3 (October 31, 2020): 389 - 412. Accessed January 17, 2022. https://bmeb-bi.org/index.php/BEMP/article/view/1358.