@book{7380,
	author = {De Mottoni, Piero.},
	title = {Nonlinear differential equations :},
	publisher = {Academic Press,},
	year = {c1981.},
	address = {New York :},
	note = {"Proceedings of a symposium based on the international conference on nonlinear differential equations: invariance, stability, and bifurcation, held in Villa Madruzzo, Trento, Italy, from May 25-30, 1980."}
}