@book{27109,
	author = {BHATIA, N. P. and SZEGO, G. P.},
	title = {Dynamical systems :},
	publisher = {Springer-Verlag,},
	year = {1967.},
	address = {Berlin :},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=27109}
}