Luo, Zhendong, and Shiju Jin. “A Reduced-Order Extrapolation Spectral-Finite Difference Scheme Based on the POD Method for 2D Second-Order Hyperbolic Equations”. Mathematical Modelling and Analysis 22, no. 5 (September 21, 2017): 569–586. Accessed May 13, 2025. https://journals.vilniustech.lt/index.php/MMA/article/view/913.