Manolis Koubarakis T. Koutris Christos Tryfonopoulos Paraskevi Raftopoulou Information Alert in Distributed Digital Libraries: The Models, Languages, and Architecture of DIAS. 527-542 2002 conf/ercimdl/2002 ECDL http://link.springer.de/link/service/series/0558/bibs/2458/24580527.htm db/conf/ercimdl/ecdl2002.html#KoubarakisKTR02