Derek Mannering Jon G. Hall Lucia Rapanotti Safety Process Improvement with POSE and Alloy. 252-257 2007 conf/safecomp/2007 SAFECOMP http://dx.doi.org/10.1007/978-3-540-75101-4_23 db/conf/safecomp/safecomp2007.html#ManneringHR07