Wichtowski, Marek, and Ewa Weinert-Raczka. “Analytical Solution for Temporal Photorefractive Response in the Diffusion Regime”. Photonics Letters of Poland 1, no. 4 (December 31, 2009): pp. 169–171. Accessed November 20, 2024. http://m.photonics.pl/PLP/index.php/letters/article/view/1-57.