Welcome to Apache Cassandra 1.0. by Roberto Zicari · Published October 1, 2011 · Updated February 16, 2014 DataStax white paper for Architects, Developers and IT Managers. DOWNLOAD (PDF)
Inside MarkLogic Server. Its data model, indexing system, update model, and operational behaviors. Revision 6 January 1, 2011 by Roberto Zicari · Published January 1, 2011 · Last modified February 16, 2014
The Graph DB Landscape and SonesDB September 1, 2010 by Roberto Zicari · Published September 1, 2010 · Last modified February 16, 2014
Cassandra January 1, 2008 by Roberto Zicari · Published January 1, 2008 · Last modified February 16, 2014