Suzanne M. Embury Nick J. Fiddian W. A. Gray Andrew C. Jones Advances in Databases, 16th British National Conferenc on Databases, BNCOD 16, Cardiff, Wales, UK, July 6-8, 1998, Proceedings BNCOD Lecture Notes in Computer Science 1405 Springer 1998 3-540-64659-0 https://doi.org/10.1007/BFb0053467 https://www.wikidata.org/entity/Q135232188 db/conf/bncod/bncod98.html