Prevalence: Transparent, Fault-Tolerant Object Persistence by Roberto Zicari · Published June 1, 2005 · Updated February 18, 2014 Jim Paterson, Bell College Describes the use of the Prevayler in-memory database. LINK
The Object-Oriented Database System Manifesto January 1, 1995 by Roberto Zicari · Published January 1, 1995 · Last modified July 11, 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
Using Object Databases in .NET April 1, 2003 by Roberto Zicari · Published April 1, 2003 · Last modified February 16, 2014