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)
PM3: An Orthogonally Persistent Systems Programming Language January 1, 1999 by Roberto Zicari · Published January 1, 1999 · Last modified February 19, 2014
Persistenz von Objekten September 1, 2004 by Roberto Zicari · Published September 1, 2004 · Last modified February 18, 2014