Zhiyuan Chen Aryya Gangopadhyay George Karabatis Michael McGuire Claire Welty Semantic Integration and Knowledge Discovery for Environmental Research. 43-68 2007 18 J. Database Manag. 1 http://www.igi-pub.com/articles/details.asp?ID=6530 db/journals/jdm/jdm18.html#ChenGKMW07