@book{23799,
	author = {KELLER, Robert},
	title = {Expert system technology :},
	publisher = {Yourdon Press,},
	year = {1987.},
	series = {Yourdon Press Computing Series},
	address = {Englewood Cliffs :},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=23799}
}