Burde,  Gerhard  <br/><br/>
Knots / 
Gerhard Burde, Heiner Zieschang. 
 - Berlin :   De Gruyter,   1985. 
 - 399 S. 
 - De Gruyter studies in mathematics ;  5 .
<br/><br/><label>ISBN: </label>0899250149  9780899250144 
<br/><br/><label>Subjects--Index Terms: </label>მათემატიკა 
<br/><br/><label>Universal Decimal Class. No.: </label>51