Oliver Kopp Ralph Mietzner Frank Leymann The Influence of an External Transaction on a BPEL Scope. 381-388 2009 OTM Conferences (1) http://dx.doi.org/10.1007/978-3-642-05148-7_27 conf/otm/2009-1 db/conf/otm/otm2009-1.html#KoppML09