@book{29111,
	author = {MERCIK, Jacek W.},
	title = {Wybrane problemy decyzji grupowych /},
	year = {1990.},
	address = {Wroclaw,},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=29111}
}