Introduction to Object Oriented Databases by Roberto Zicari · Published January 1, 2000 · Updated February 16, 2014 Liam Quin Introduces to the basic concepts of object oriented databases. LINK (DOC)
The Technology and Business of ObjectStore January 1, 2007 by Roberto Zicari · Published January 1, 2007 · Last modified January 3, 2015
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
The Definite Guide to db4o June 1, 2006 by Roberto Zicari · Published June 1, 2006 · Last modified January 3, 2015