?. published on the web by University of Pittsburgh, School of Information Sciences, (2003)Report on the NSF Workshop on Research Directions for Digital Libraries, June 15-17, 2003, Chatham, MA.
F. Abel, E. Herder, I. Marenzi, W. Nejdl, and S. Zerr. 2nd Annual Workshop on Search in Social Media (SSM '09), co-located with ACM SIGIR 2009 Conference on Information Retrieval, Boston, USA, (July 2009)
F. Abel, I. Marenzi, W. Nejdl, and S. Zerr. Workshop on Social Information Retrieval for Technology-Enhanced Learning (SIRTEL'09) at the International Conference on Web-based Learning (ICWL '09), Aachen, Germany, Vol-535, CEUR-WS.org, (August 2009)
M. Alam, P. Groth, P. Hitzler, H. Paulheim, H. Sack, and V. Tresp. CIKM '20: The 29th ACM International Conference on Information and Knowledge Management, Virtual Event, Ireland, October 19-23, 2020, page 3523--3524. ACM, (2020)
G. Attwell, J. Cook, and A. Ravenscroft. 2nd World Summit on the Knowledge Society (WSKS 2009), Crete, Greece, (2009), 49, page 15-25. Springer, (2009)