@book{16039,
	author = {Zill, Dennis G},
	title = {Differential equation with boundary value problems},
	publisher = {Cengage Learning},
	year = {2014},
	address = {Ancover},
	edition = {8th ed.},
	note = {2118 17/09/2015 UBC15/7408 30/11/2015 Main Budget}
}