@book{30710,
	title = {Selected problems of mathematics /},
	publisher = {PK,},
	year = {1995.},
	address = {Cracow :},
	note = {Anniversary issue vol. no. 6.},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=30710}
}