Annunziato, Mario, and Hanno Gottschalk. “Calibration of Lévy Processes Using Optimal Control of Kolmogorov Equations With Periodic Boundary Conditions”. Mathematical Modelling and Analysis 23, no. 3 (June 14, 2018): 390-413. Accessed January 6, 2025. https://mla.vgtu.lt/index.php/MMA/article/view/2814.