title: relational databases for querying xml documents : limitations and opportunities. authors: jeffrey f. naughton , kristin tufte , chun zhang , gang he , david j. dewitt , jayavel shanmugasundaram. venue: vldb. year: 1999
title: storing and querying ordered xml using a relational database system. authors: igor tatarinov , stratis d. viglas , kevin beyer , jayavel shanmugasundaram , eugene shekita , chun zhang. venue: international conference on management of data. year: 2002