title: schema and database evolution in the o2 object database system. authors: f ferrandina , t meyer , r zicari , g ferran , j madec. venue: vldb. year: 1995
title: schema and database evolution in the oâ 3/4 object database system. authors: f ferrandina , t meyer , r zicari , g ferran , j madec. venue: proc . of the 21st intâ ?? l conf . on very large databases (. year: nan