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)
020.01 Accessing Identity Data via EJB November 1, 2005 by Roberto Zicari · Published November 1, 2005 · Last modified February 18, 2014
Impedance Mismatch is not an “Objects vs. Relations” Problem.(DRAFT) August 1, 2012 by Roberto Zicari · Published August 1, 2012 · Last modified February 16, 2014