TY  - GEN
AU  - Mazur,Barry
AU  - Messing,William
TI  - Universal extensions and one dimensional crystalline cohomology
T2  - Lecture notes in mathematics
SN  - 0387066594 (New York)
U1  - 510/.8 s514/.23 
PY  - 1974///
CY  - Berlin, New York
PB  - Springer-Verlag
KW  - Abelian varieties
KW  - Group schemes (Mathematics)
KW  - Homology theory
KW  - Lie algebras
N1  - Bibliography: p. 133-134
ER  -