Batrakov, K., and S. Sytova. “Mathematical Modelling of Multiwave Volume Free Electron Laser: Basic Principles and Numerical Experiments”. Mathematical Modelling and Analysis 11, no. 1 (March 31, 2006): 13-22. Accessed November 25, 2024. https://jau.vgtu.lt/index.php/MMA/article/view/9593.