BarannykA. F., and YurykI. I. “On Exact Solutions of Nonlinear Diffusion Equations”. Ukrains’kyi Matematychnyi Zhurnal 57, no. 8 (August 25, 2005): 1011 -. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3661.