Surfaces and planar discontinuous groups / Heiner Zieschang, Elmar Vogt, Hans-Dieter Coldewey ; translated from the German by J. Stillwell. Rev. and expanded translation. (Lecture notes in mathematics ; 835)
Surfaces and planar discontinuous groups / Heiner Zieschang, Elmar Vogt, Hans-Dieter Coldewey ; translated from the German by J. Stillwell.