Ma, Tian; Yu, Qingyu The Keldysh-Fichera boundary value problems for degenerate quasilinear elliptic equations of second order. (English) Zbl 0731.35044 Differ. Integral Equ. 2, No. 4, 379-388 (1989). Reviewer: G.V.Jaiani (Tbilisi) MSC: 35J70 35B05 35D05 PDFBibTeX XMLCite \textit{T. Ma} and \textit{Q. Yu}, Differ. Integral Equ. 2, No. 4, 379--388 (1989; Zbl 0731.35044)
Yu, Qingyu; Ma, Tian The alternative theorems of nonlinear weakly continuous mappings and their application. (Chinese) Zbl 0682.35045 Acta Math. Sin. 32, No. 3, 296-306 (1989). Reviewer: J.Tian MSC: 35J65 PDFBibTeX XMLCite \textit{Q. Yu} and \textit{T. Ma}, Acta Math. Sin. 32, No. 3, 296--306 (1989; Zbl 0682.35045)