Simple Object Persistence with the db4o Object Database by Roberto Zicari · Published December 1, 2004 · Updated February 18, 2014 Jim Paterson, Bell College Describes the use of the db4o object database. LINK
Debunking Object-Database Myths October 1, 1997 by Roberto Zicari · Published October 1, 1997 · Last modified February 16, 2014
027.01 Comparing the Performance of Object Databases and ORMs September 1, 2006 by Roberto Zicari · Published September 1, 2006 · Last modified February 18, 2014
038.01 An Object Database for Embedded Environments April 1, 2000 by Roberto Zicari · Published April 1, 2000 · Last modified February 18, 2014