Peter F. Linington Zoran Milosevic James B. Cole Simon Gibson Sachin Kulkarni Stephen W. Neal A unified behavioural model and a contract language for extended enterprise. 5-29 2004 51 Data Knowl. Eng. 1 http://dx.doi.org/10.1016/j.datak.2004.03.005 db/journals/dke/dke51.html#LiningtonMCGKN04