Approaches to Adding Persistence to Java by Roberto Zicari · Published January 1, 1996 · Updated February 19, 2014 Eliot Moss, Antony Hosking LINK (PDF)
038.03 An Overview of Suns Java Data Objects Specification June 1, 2000 by Roberto Zicari · Published June 1, 2000 · Last modified February 18, 2014
038.02 The JDO Object Model June 1, 2001 by Roberto Zicari · Published June 1, 2001 · Last modified February 18, 2014
038.04 A Comparison between JDO, Serialization, JDBC March 1, 2002 by Roberto Zicari · Published March 1, 2002 · Last modified February 18, 2014