Silja Eckartz Maya Daneva Roel Wieringa Jos van Hillegersberg Cross-organizational ERP management: how to create a successful business case? 1599-1604 2009 SAC http://doi.acm.org/10.1145/1529282.1529641 conf/sac/2009 db/conf/sac/sac2009.html#EckartzDWH09