Akman, Varol. <br/><br/>
Unobstructed shortest paths in polyhedral environments.   
by Varol Akman. 
 - Berlin  Springer-Verlag  1987 
 - 103p 
 - Lecture notes in computer science  251 .
<br/><br/><label>ISBN: </label>3540176292 
<br/><br/><label>Dewey Class. No.: </label>516.215028  / N87