Rutkauskas, S. Dirichlet problem for an elliptic equation with a singularity in an inner point of the domain. (Russian. English summary) Zbl 0596.35031 Differ. Uravn. Primen. 36, 74-81 (1984). MSC: 35J25 35A05 35B65 PDFBibTeX XMLCite \textit{S. Rutkauskas}, Differ. Uravn. Primen. 36, 74--81 (1984; Zbl 0596.35031)
Krivas, Yuozas; Rutkauskas, Stasis Some boundary value problems for an ordinary differential equation with a strong singularity. (Russian. English summary) Zbl 0557.34010 Differ. Uravn. Primen. 34, 16-28 (1983). MSC: 34B10 PDFBibTeX XMLCite \textit{Y. Krivas} and \textit{S. Rutkauskas}, Differ. Uravn. Primen. 34, 16--28 (1983; Zbl 0557.34010)
Rutkauskas, Stasis The Dirichlet problem for a system of elliptic equations strongly degenerate on the line. (Russian) Zbl 0463.35030 Differ. Uravn. Primen. 27, 57-81 (1980). MSC: 35J55 35A05 35J70 35C10 PDFBibTeX XMLCite \textit{S. Rutkauskas}, Differ. Uravn. Primen. 27, 57--81 (1980; Zbl 0463.35030)
Rutkauskas, Stasis The Dirichlet problem for the elliptic equation degenerated at the points of a straight line. (Russian) Zbl 0418.35050 Differ. Uravn. Primen. 24, 87-103 (1979). MSC: 35J70 35A05 PDFBibTeX XMLCite \textit{S. Rutkauskas}, Differ. Uravn. Primen. 24, 87--103 (1979; Zbl 0418.35050)