Amachukwu, Ngozi J., Happiness O. Obiora-Ilouno, and Edwin I. Obisue. “Modeling of Extreme Crude Oil Price Using the Generalized Pareto Distribution: Brent and West Texas Benchmark Price”. Earthline Journal of Mathematical Sciences 6, no. 2 (April 28, 2021): 359-374. Accessed February 5, 2025. https://earthlinepublishers.com/index.php/ejms/article/view/335.