Alan Kaplan John Bubba Jack C. Wileden The Exu Approach to Safe, Transparent and Lightweight Interoperability. 393-394 2001 conf/compsac/2001 COMPSAC db/conf/compsac/compsac2001.html#KaplanBW01 http://doi.ieeecomputersociety.org/10.1109/CMPSAC.2001.960644