@book{21012,
	author = {NAGEL, Ernest and NEWMAN, James K.},
	title = {Twierdzenie Gödla /},
	year = {1966.},
	address = {Warszawa,},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=21012}
}