Seminaire Bourbaki vol. 1980/ 81  Exposes 561-578 
A. Dold, B. Eckmann 
 - New York  Springer-Verlag  1981 
 - 297 p  fig  25 cm 
 - Lecture notes in mathematics  901 .
<br/><br/> Contine bibliografie 
<br/><br/><label>ISBN: </label>038711176x