Čiupaila, Regimantas, Mifodijus Sapagovas, and Kristina Pupalaigė. “M-Matrices and Convergence of Finite Difference Scheme for Parabolic Equation With Integral Boundary Condition”. Mathematical Modelling and Analysis 25, no. 2 (March 18, 2020): 167-183. Accessed November 15, 2024. https://jbem.vgtu.lt/index.php/MMA/article/view/8023.