Introduction to Object-Oriented Databases by Roberto Zicari · Published September 1, 1998 · Updated February 16, 2014 Steve Hand and Jane Chandler Very visual introduction to ODBMS. DOWNLOAD (PDF)
Simple Object Persistence with the db4o Object Database December 1, 2004 by Roberto Zicari · Published December 1, 2004 · Last modified February 18, 2014
RxO system. Simple semantic approach for representation complex objects data in table form.. September 1, 2011 by Roberto Zicari · Published September 1, 2011 · Last modified February 16, 2014
So you think you know JPA? Think again January 1, 2012 by Roberto Zicari · Published January 1, 2012 · Last modified February 16, 2014