Hywel R. Dunn-Davies Jim Cunningham Shamimabi Paurobally Synchronization protocols for reliable communication in fully distributed agent systems. 1539-1542 2008 AAMAS (3) http://doi.acm.org/10.1145/1402821.1402919 conf/atal/2008-3 db/conf/atal/aamas2008-3.html#Dunn-DaviesCP08