Elke Hochmüller Michael Dobrovnik Identifying Types of Extra-Functional Requirements in the Context of Business Process Support Systems. 2003 conf/caise/2003ws CAiSE Workshops http://sunsite.informatik.rwth-aachen.de/Publications/CEUR-WS/Vol-75/files/REBPS_06.pdf db/conf/caise/caisews2003.html#HochmullerD03