Multi-granularity Locks in an Object-Oriented Database by Roberto Zicari · Published January 1, 2006 · Updated February 18, 2014 Daniel F. Lieuwen, H.V. Jagadish, AT&T Bell Labs DOWNLOAD (PDF)
029.01 Hitting the Relational Wall January 1, 2005 by Roberto Zicari · Published January 1, 2005 · 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
The Object-Oriented Database System Manifesto January 1, 1995 by Roberto Zicari · Published January 1, 1995 · Last modified July 11, 2014