@book{42183,
author = {Marsden, Jerrold E. and Montgomery, R.},
title = {Reduction, symmetry, and phases in mechanics /},
publisher = {American Mathematical Society,},
year = {c1990.},
series = {Memoirs of the American Mathematical Society, },
address = {Providence, R.I., USA :},
note = {"Volume 88, number 436 (first of 2 numbers)."},
url = {http://www.ams.org/memo/0436}
}