Chiara Bodei Pierpaolo Degano Corrado Priami Constructing Specific SOS Semantics for Concurrency via Abstract Interpretation. 168-183 http://link.springer.de/link/service/series/0558/bibs/1503/15030168.htm 1998 conf/sas/1998 SAS db/conf/sas/sas98.html#BodeiDP98