Analysing, Profiling and Optimising Orthogonal Persistence for Java by Roberto Zicari · Published January 1, 1997 · Updated February 19, 2014 Quintin Cutts, Antony Hosking LINK (PDF)
Object Persistence Design Guidelines January 1, 2005 by Roberto Zicari · Published January 1, 2005 · Last modified February 19, 2014
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