TY  - JOUR
AU  - Shigeyuki Morita
TI  - The extension of Johnson's homomorphism form the Torelli group to the mapping class group.
JO  - Inventiones mathematicae
PY  - 1993
SP  - 197
EP  - 224
VL  - 111
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM_1993__111_1_144076/
ID  - IM_1993__111_1_144076
ER  -