@book{7881,
	author = {International Symposium on Differential Equations and Dynamical Systems and Hale, Jack K., and United States.},
	title = {Differential equations and dynamical systems :},
	publisher = {Academic Press,},
	year = {1967.},
	address = {New York :},
	note = {"Sponsored by the United States Air Force Office of Scientific Research, and the University of Puerto Rico, and Brown University."}
}