Berczyński, Paweł, Jerzy Jasiński, and Yury Kravtsov. “Gaussian Beam Evolution in Logarithmically Saturable Nonlinear Media”. Photonics Letters of Poland 5, no. 2 (June 30, 2013): pp. 78–80. Accessed April 24, 2024. https://photonics.pl/PLP/index.php/letters/article/view/5-28.