João Araújo Jon Whittle Ana Moreira Choosing the Right Time to Compose Aspectual Scenarios. 29-32 2006 conf/compsac/2006 COMPSAC (2) http://doi.ieeecomputersociety.org/10.1109/COMPSAC.2006.124 db/conf/compsac/compsac2006-2.html#AraujoWM06