Wieke de Vries Frank S. de Boer Wiebe van der Hoek John-Jules Ch. Meyer A Truly Concurrent Model for Interacting Agents. 16-30 http://link.springer.de/link/service/series/0558/bibs/2132/21320016.htm 2001 conf/prima/2001 PRIMA db/conf/prima/prima2001.html#VriesBHM01