Tanaka, Daiki, Nobuyuki Higashimori, and Yuusuke Iso. “Estimates for Solutions to the Transport Equation under the Perturbation of Its Attenuation and Scattering Terms”. Tamkang Journal of Mathematics 43, no. 2 (June 30, 2012): 313–320. Accessed April 30, 2024. https://journals.math.tku.edu.tw/index.php/TKJM/article/view/1018.