title: a general techniques for querying xml documents using a relational database system. authors: stratis viglas , eugene j. shekita , rajasekar krishnamurthy , jayavel shanmugasundaram , jeffrey f. naughton , jerry kiernan , igor tatarinov. venue: sigmod record. year: 2001
title: the structured information manager : a database system for sgml documents. authors: ron sacks-davis. venue: very large data bases. year: 1996