@Article{JPDE-2-62, author = {Bai Donghua, Liu Yi}, title = {Theorem of Upper-lower Solutions for a Class of Nonlinear Degenerate Parabolic Systems Without Quasi-monotony}, journal = {Journal of Partial Differential Equations}, year = {1989}, volume = {2}, number = {3}, pages = {62--78}, abstract = { In this paper we generalize the comparative method of solving some non-degenerate reaction-diffusion systems to a class of nonlinear degenerate parabolic systems without quasi-monotony, and obtain the relevant theorem of upper-lower solutions.}, issn = {2079-732X}, doi = {https://doi.org/}, url = {http://global-sci.org/intro/article_detail/jpde/5836.html} }