TY  - BOOK
AU  - Cendra Hernan
AU  - Marsden Jerrold E
AU  - Ratiu Tudor S
TI  - Lagrangian reduction by stages
SN  - 0-8218-2715-4
U1  - 510 
PY  - 2001///
CY  - Providence
PB  - AMS
KW  - Differentiable dynamical systems
KW  - Lagrange equations
KW  - Variational principles
ER  -