Ghosh, Subhir Kumar <br/><br/>
Visibility algorithms in the plane   
by Subir Kumar Ghosh 
 - Cambridge  Cambridge University Press  2007 
 - xiii, 318p. 
<br/><br/><label>ISBN: </label>0521875749 
<br/><br/><label>Dewey Class. No.: </label>511.5  / P071