Martí Navarro Elena del Val Noguera Miguel Rebollo Vicente Julián Composing and Ensuring Time-Bounded Agent Services. 553-560 2009 IWANN (1) http://dx.doi.org/10.1007/978-3-642-02478-8_70 conf/iwann/2009-1 db/conf/iwann/iwann2009-1.html#NavarroNRJ09