@book{34195,
	author = {KRYSZEWSKI, Wojciech and Uniwersytet Mikołaja Kopernika},
	title = {Homotopy properties of set-valued mapping /},
	publisher = {UMK,},
	year = {1997.},
	address = {Toruń :},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=34195}
}