Ghrist, R.W., et al <br/><br/>
Knots & links three dimensional flows 
R.W. Ghrist, et al 
 - Berlin  Springer  1997 
 - x  208 
 - Lecture notes in mathematics 1654 .
<br/><br/><label>ISBN: </label>9783540626282 
<br/><br/><label>Dewey Class. No.: </label>12.02+12.04+6.07  / GHRI