title: integrating modelling systems for environmental management information systems. authors: david j. abel , dean kuo , kerry l. taylor. venue: sigmod record. year: 1997
title: www-udk : a web-based environmental meta-information system. authors: ralf kramer , ralf nicholai , arne koschel , claudia rolker , peter lockemann , andree keitel , rudolf legat , konrad tirm. venue: acm sigmod record. year: 1997