Datenbanksysteme. Eine Einführung (In German) by Roberto Zicari · November 3, 2013 A. Kemper and A. Eickler, Datenbanksysteme. Eine Einführung (In German), Oldenbourg, 2004 (5th edition), ISBN 3-486-27392-2
Making Enterprise Information Management (EIM) Work for Business A Guide to Understanding Information as an Asset 3 Nov, 2013