@book{185,
	author = {Kreyszig, Erwin and Norminton, E. J.},
	title = {Advanced engineering mathematics },
	publisher = {John Wiley,},
	year = {2011.},
	address = {Hoboken :},
	edition = {10th ed.},
	url = {https://www.amazon.com/Advanced-Engineering-Mathematics-Erwin-Kreyszig/dp/0470646136}
}