6LI Qing, CHEN Yuliu. Modelling and analysis of enterpriseand information system from requirements to realization[M]. Berlin, Germany.. Springer-Verlag,2009. ISO. ISO15704.
7Automation systems and integration -- frame- work for enterprise architectures and models[S]. Geneva, Switzerland: ISO, 2009.
8PEACOCK E, TANNIRU M. Activity-based justification of IT investmentsi[J]. Information & Management, 2005, 42 (3) :415-424.