@book{12303,
	author = {ELSGOLC, L. E.},
	title = {Differencialnye uravnenija i variacionnoe iscislenie /},
	year = {1969.},
	address = {Moskva,},
	edition = {Izd. 2.},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=12303}
}