wang, qingbo, and Xiuwei Yin. “Least Squares Estimator for Vasicek Model Driven by Fractional Levy Processes”. JOURNAL OF ADVANCES IN MATHEMATICS 14, no. 2 (November 1, 2018): 8013–8024. Accessed May 8, 2024. https://rajpub.com/index.php/jam/article/view/7839.