Cost Model for Digital Curation: Cost of Digital Migration. - Ulla Bøgvad Kejser; Alex Thirifays; Anders Bo Nielsen (iPRES, 2009)

Cost Aspects of Ingest and Normalization. - Ulla Bøgvad Kejser; Alex Thirifays; Anders Bo Nielsen (iPRES, 2011)

Evaluation of a Large Migration Project. - Alex Thirifays; Barbara Dokkedal; Anders Bo Nielsen (iPRES, 2011)

Cost Model for Digital Preservation: Cost of Digital Migration. - Ulla Bøgvad Kejser; Anders Bo Nielsen; Alex Thirifays (Int. J. Digit. Curation, 2011)

Towards a Common Approach for Access to Digital Archival Records in Europe. - Alex Thirifays; Katherine Hougaard Edsen Johansen (iPRES, 2015)