Ligaard, H.J <br/><br/>
Homology Operations in the Eilenberg - Moore Specral Sequence 
H. J. Ligaard ; Ib Madsen 
 - Aarhus  Aarhus Universitet  1974 
 - 15 p  20 cm 
 - preprint 1974 / 75  No. 1 .
<br/><br/> Contine bibliografie