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J. Fernandez-Ramil, и P. Hall. M882 Course on Managing the Software Enterprise, Learning Space, The Open University, http://openlearn.open.ac.uk/course/view.php?id=1698, (2007)Work licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Licence.
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T. Miles-Board, L. Carr, S. Kampa, и W. Hall. Proc. of the 12th international conference on World Wide Web, стр. 234-243. Budapest, Hungary, ACM Press, (2003)
T. Miles-Board, S. Kampa, L. Carr, и W. Hall. Proceedings of the twelfth ACM conference on Hypertext and Hypermedia, ACM Press New York, NY, USA, (2001)