1 Optical Memory New,Jan.1990
2 Barry Cinnamon:Optical Diak Document Storage and Retrieval Systems.AIIM 1989.ISBN0-89258-116-6
3 Felix P.Krayeski:Transition if an Image System form Paper to Microfiche to Optical Disk.LC.CRS.1988
4 Gerry Walter:Emerging Options for Productive Opotical Filing Arrives INFORM Vol.2 Issil.Jan.1988
5 David Bratt:Document Imaging Systems today and tomorrow.Proceedings of the Fifth Annual Conference on Optical Information System,1988
6 OCLC Newsletter July/Aug.No.186 1990.