Wanitjirattikal, Puntipa, and Seksan Kiatsupaibul. “Tail Dependenceo F Student’st Copula and Double T Copula and Their Effects on Pricing Credit Derivative”. Science & Technology Asia 12, no. 2 (October 31, 2015): 1–9. Accessed April 24, 2024. https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/41513.