Roberto M. Amadio Silvano Dal-Zilio Resource Control for Synchronous Cooperative Threads. 68-82 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3170&spage=68 2004 conf/concur/2004 CONCUR db/conf/concur/concur2004.html#AmadioD04