title: pattern matching and pattern discovery in scientific , program , and document databases. authors: kaizhong zhang , dennis shasha , jason tsong-li wang. venue: sigmod conference. year: 1995
title: structural matching and discovery in document databases. authors: jason tsong-li wang , dennis shasha , george j. s. chang , liam relihan , kaizhong zhang , girish patel. venue: international conference on management of data. year: 1997