Liu, Zhen Hai, On Doubly Degenerate Quasilinear Parabolic Equations of Higher Order, Acta mathematica Sinica. English series (Print) , 21(1), 2004, pp. 197-208
We deal with the existence of periodic solutions for doubly degenerate quasilinear parabolic equations of higher order, which can degenerate, on a part of the boundary, on a segment in the interior of the domain and in time.