title: a fast index for semistructured data. authors: brian cooper , gísli r. hjaltason , michael j. franklin , neal sample , moshe shadmon. venue: vldb. year: 2001.0
title: semistructured and structured data in the web : going back and forth. authors: paolo atzeni , giansalvatore mecca , paolo merialdo. venue: acm sigmod record. year: 1997.0