Thonglim, Pattaya, Kamon Budsaba, and Andrei I. Volodin. “Asymptotic confidence ellipses of parameters for the Birnbaum-Saunders distribution”. Thailand Statistician 12, no. 2 (May 27, 2015): 207–222. accessed April 13, 2025. https://ph02.tci-thaijo.org/index.php/thaistat/article/view/34200.