Surfaces and planar discontinuous groups - Zieschang, Heiner authir; Vogt, Elmar; Coldewey, Hans-Dieter (Berlin : Springer-Verlag, 1980)
Translated from the German, entitled'Flachen und ebene diskontinuierliche Gruppen (Lecture notes in mathematics, vol.122)' , 1970 by J. Stillwell
Reading list : p. 310-329.
Keywords: Discontinuous groups; Combinatorial topology