@book{14098,
	title = {Problemy matematiceskoj fiziki. Vypusk 5. Spekrtralnaja teorija.},
	year = {1971.},
	address = {Leningrad,},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=14098}
}