Krasnov, V. A. On orientable real algebraic \(M\)-surfaces. (English. Russian original) Zbl 0936.14039 Math. Notes 62, No. 4, 434-438 (1997); translation from Mat. Zametki 62, No. 4, 520-526 (1997). MSC: 14P25 14F25 PDFBibTeX XMLCite \textit{V. A. Krasnov}, Math. Notes 62, No. 4, 434--438 (1997; Zbl 0936.14039); translation from Mat. Zametki 62, No. 4, 520--526 (1997) Full Text: DOI
Grigorchuk, R. I.; Kurchanov, P. F. Classification of epimorphisms of fundamental groups of surfaces onto free groups. (English. Russian original) Zbl 0810.20032 Math. Notes 48, No. 2, 736-742 (1990); translation from Mat. Zametki 48, No. 2, 26-35 (1990). Reviewer: W.Heil (Tallahassee) MSC: 20F34 57M07 57M05 20E36 20E05 PDFBibTeX XMLCite \textit{R. I. Grigorchuk} and \textit{P. F. Kurchanov}, Math. Notes 48, No. 2, 736--742 (1990; Zbl 0810.20032); translation from Mat. Zametki 48, No. 2, 26--35 (1990) Full Text: DOI