Erika Ábrahám Marcello M. Bonsangue Frank S. de Boer Martin Steffen Object Connectivity and Full Abstraction for a Concurrent Calculus of Classes. 37-51 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3407&spage=37 2004 conf/ictac/2004 ICTAC db/conf/ictac/ictac2004.html#AbrahamBBS04