Kurbatova, N. A boundary value problem for a system of first order equations. (Russian. English summary) Zbl 0753.35016 Differ. Uravn. Primen. 45, 51-58 (1990). Reviewer: I.Straškraba MSC: 35F15 PDFBibTeX XMLCite \textit{N. Kurbatova}, Differ. Uravn. Primen. 45, 51--58 (1990; Zbl 0753.35016)
Kurbatova, Nadezhda On boundary value problems for two first order systems. (Russian. English summary) Zbl 0636.35061 Differ. Uravn. Primen. 40, 47-52 (1987). MSC: 35M99 35F15 PDFBibTeX XMLCite \textit{N. Kurbatova}, Differ. Uravn. Primen. 40, 47--52 (1987; Zbl 0636.35061)