Couchbase: Understanding group_level in View Queries with Couchbase Server 2.0 by Roberto Zicari · Published January 1, 2013 · Updated February 16, 2014 LINK
Ultra-High Performance NoSQL Benchmarking: Analyzing Durability and Performance Tradeoffs January 1, 2013 by Roberto Zicari · Published January 1, 2013 · Last modified February 16, 2014
Evaluating Apache Cassandra as a Cloud Database June 5, 2014 by Roberto Zicari · Published June 5, 2014 · Last modified February 12, 2015
Gartner Magic Quadrant for Operational DBMS 2015 October 16, 2015 by Roberto Zicari · Published October 16, 2015