@book{208091,
	author = {Nekorkin, Vladimir I.},
	title = {Introduction to nonlinear oscillations /},
	publisher = {Wiley-VCH,},
	year = {2015.},
	address = {Weinheim :},
	note = {Title from resource description page (Recorded Books, viewed June 15, 2015).},
	url = {http://onlinelibrary.wiley.com/book/10.1002/9783527695942}
}