@book{15638,
	author = {Chernoff, Paul R. and Marsden, Jerrold E. and Marsden, Jerrold E. ; jt. auth},
	title = {Properties of infinite dimensional hamiltonian system},
	publisher = {Springer-Verlag},
	year = {1974},
	series = {Lecture notes in Mathematics},
	address = {Berlin}
}