Ivanov, A. O <br/><br/>
Minimal networks : the Steiner problem and its generalizations 
Alexandr O. Ivanov, Alexei A. Tuzhilin 
 - Boca Raton, FL  CRC Press  c1994 
 - xviii, 414 p. : ill. ; 25 cm., : acid-free paper 
<br/><br/> Includes bibliographical references (p. 401-404) and index 
<br/><br/><label>ISBN: </label>9780849386428 
<br/><br/><label>ISSN: </label>93030764 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Steiner systems
<br/><br/><label>Dewey Class. No.: </label>511.5 IVA