TY  - BOOK
AU  - Marsden J.E.
AU  - Montgomery R.,Ratiu T.
TI  - Reduction, Symmetry and Phases in Mechanics
U1  - MAMS 
PY  - 1990///
CY  - Providence
PB  - Amer. Math. Soc.
N1  - Memoirs of the Amer. Math. Soc., Vol. 88, N 436
ER  -