@book{30622,
	author = {HOLMES, Mark H.},
	title = {Introduction to perturbation methods /},
	publisher = {Springer-Verl.,},
	year = {1995.},
	series = {Texts in Applied Mathematics ;},
	address = {New York [et al.] :},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=30622}
}