Amir Hayat Thomas Rossler Muhammad Alam Proposed Framework for Achieving Interoperable Services Between European Public Administrations. 424-431 2006 conf/IEEEares/2006 ARES http://doi.ieeecomputersociety.org/10.1109/ARES.2006.97 db/conf/IEEEares/ares2006.html#HayatRA06