Peter Rödig Uwe M. Borghoff Jan Scheffczyk Lothar Schmitz Preservation of digital publications: an OAIS extension and implementation. 131-139 2003 conf/doceng/2003 ACM Symposium on Document Engineering http://doi.acm.org/10.1145/958220.958245 db/conf/doceng/doceng2003.html#RodigBSS03