DegtyarevS. P., and TedeevA. F. “Bilateral Estimates for the Support of a Solution of the Cauchy Problem for an Anisotropic Quasilinear Degenerate Equation”. Ukrains’kyi Matematychnyi Zhurnal 58, no. 11 (November 25, 2006): 1477–1486. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3548.