Schema and Database Evolution in the O2 Object Database System. - Fabrizio Ferrandina; Thorsten Meyer; Roberto V. Zicari; Guy Ferran; Joëlle Madec (VLDB, 1995)

Tool Construction for the British Airways SEE with the O2 ODBMS. - Wolfgang Emmerich; Jim Arlow; Joëlle Madec; Mark Phoenix (Theory Pract. Object Syst., 1997)