TY  - JOUR
AU  - Scott Wolpert
TI  - An elementary formula for the Fenchel-Nielsen twist.
JO  - Commentarii mathematici Helvetici
PY  - 1981
SP  - 132
EP  - 135
VL  - 56
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1981__56_139861/
ID  - CMH_1981__56_139861
ER  -