Genov, Angel; Sopolov, Nikolai Verallgemeinerte Lösungen des zweiten Randwertproblems für gewisse nichtlineare Differentialgleichungen erster Ordnung. (Bulgarian) Zbl 0316.35014 God. Vissh. Tekh. Uchebn. Zaved., Mat. 4(1967), No. 1, 105-113 (1971). MSC: 35D05 35F30 PDFBibTeX XMLCite \textit{A. Genov} and \textit{N. Sopolov}, God. Vissh. Tekh. Uchebn. Zaved., Mat. 4, No. 1, 105--113 (1971; Zbl 0316.35014)
Genov, Angel Elliptical-parabolic equations degenerating on the whole boundary. (Bulgarian) Zbl 0308.35054 God. Vissh. Tekh. Uchebn. Zaved., Mat. 2(1965), No. 2, 147-152 (1967). MSC: 35J70 35B45 35D05 35D10 PDFBibTeX XMLCite \textit{A. Genov}, God. Vissh. Tekh. Uchebn. Zaved., Mat. 2, No. 2, 147--152 (1967; Zbl 0308.35054)
Genov, Angel Some theorems of uniqueness of elliptical equations degenerating on the whole boundary. (Bulgarian) Zbl 0308.35053 God. Vissh. Tekh. Uchebn. Zaved., Mat. 2(1965), No. 2, 141-146 (1967). MSC: 35J70 35B45 PDFBibTeX XMLCite \textit{A. Genov}, God. Vissh. Tekh. Uchebn. Zaved., Mat. 2, No. 2, 141--146 (1967; Zbl 0308.35053)