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)
Couchbase: Understanding group_level in View Queries with Couchbase Server 2.0 January 1, 2013 by Roberto Zicari · Published January 1, 2013 · Last modified February 16, 2014
2013 Gartner Magic Quadrant for Operational Database Management Systems . March 23, 2014 by Roberto Zicari · Published March 23, 2014 · Last modified July 25, 2014
Couchbase Server: Accelerating Database Workloads with NVM Express* September 3, 2015 by Roberto Zicari · Published September 3, 2015