Chivu Cojocaru, Mariana, and Andaluzia Matei. “On a Class of Saddle Point Problems and Convergence Results”. Mathematical Modelling and Analysis 25, no. 4 (October 13, 2020): 608-621. Accessed July 16, 2024. https://journals.vilniustech.lt/index.php/MMA/article/view/11140.