Alan Jeffrey Julian Rathke Java Jr: Fully Abstract Trace Semantics for a Core Java Language. 423-438 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3444&spage=423 2005 conf/esop/2005 ESOP db/conf/esop/esop2005.html#JeffreyR05