Alexander Maedche Steffen Staab Nenad Stojanovic Rudi Studer York Sure SEAL - A Framework for Developing SEmantic Web PortALs. 1-22 2001 conf/bncod/2001 BNCOD http://link.springer.de/link/service/series/0558/bibs/2097/20970001.htm db/conf/bncod/bncod2001.html#MaedcheSSSS01