Andrew P. Black Vincent Cremet Rachid Guerraoui Martin Odersky An Equational Theory for Transactions. 38-49 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2914&spage=38 2003 conf/fsttcs/2003 FSTTCS db/conf/fsttcs/fsttcs2003.html#BlackCGO03