Mazur, Barry <br/><br/>
Universal extensions and one dimensional crystalline cohomology 
Barry Mazur, William Messing 
 - Berlin  Springer-Verlag  1974 
 - vi, 134 p. ; 24 cm. 
 - Lecture notes in mathematics (Springer-Verlag) ; 370. .
<br/><br/>Bibliography: p. 133-134. 
<br/><br/><label>ISBN: </label>0387066594 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Abelian varieties<br/>Group schemes (Mathematics)<br/>Homology theory<br/>Lie algebras