Wieke de Vries Frank S. de Boer Koen V. Hindriks Wiebe van der Hoek John-Jules Ch. Meyer A Programming Language for Coordinating Group Actions. 313-321 2001 conf/ceemas/2001 CEEMAS http://link.springer.de/link/service/series/0558/bibs/2296/22960313.htm db/conf/ceemas/ceemas2001.html#VriesBHHM01