@book{11886,
	author = {SWANSON, C. A.},
	title = {Comparison and Oscyllation Theory of Linear Differential Equations /},
	publisher = {Academic Press,},
	year = {1968.},
	address = {Nowy Jork :},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=11886}
}