“Existence and Nonexistence of Interfaces of Weak Solutions for Nonlinear Degenerate Parabolic Systems”, J. Part. Diff. Eq., vol. 9, no. 2, pp. 177–185, Sep. 1996, Accessed: Feb. 27, 2026. [Online]. Available: https://global-sci.com/index.php/jpde/article/view/3824