Zieschang, Heiner  authir <br/><br/>
Surfaces and planar discontinuous groups / 
Heiner Zieschang, Elmar Vogt, Hans-Dieter Coldewey 
 - Revised and expanded translation 
 - Berlin :  Springer-Verlag,  1980 
 - 334 p. :  ill. ;  25 cm. 
 - Lecture notes in mathematics ;  835 .
<br/><br/> Translated from the German, entitled'Flachen und ebene diskontinuierliche Gruppen (Lecture notes in mathematics, vol.122)' , 1970  by J. Stillwell 
<br/><br/>Reading list : p. 310-329. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Discontinuous groups.<br/>Combinatorial topology.