Database Interoperability using a Database's own Natural Query Language. - Robert Warrender; David Nelson; Sue Stirk (BNCOD Posters, 2003)

A Nested Matrix Model for Schema Versioning in Object-Oriented Databases. - Liu Xian; David Nelson; Sue Stirk (BNCOD Posters, 2003)

Managing Schema Versions in Object-Oriented Databases. - Xian Liu; David Nelson; Simon Stobart; Sue Stirk (ADBIS, 2005)