1. K. Smith and G. Gupta, “Preface,” in Neural Networks in Business, Techniques and Applications, Ieda Group Publishing.
2. Action Learning. (2012, October 7). Fee Ranges For Consulting Services [Online]. Available: http://www.action-learning.com/fee-ranges-for-consulting-services.
3. Mike Newman, “ERP Systems,” ERP Systems and Competitive Advantage.
4. Warren S. McCulloch, Walter Pitts, “Abstract”, A logical calculus of ideas immanent in nervous activity.
5. Rumelhart, David E.; Hinton, Geoffrey E.; Williams, Ronald J. (8 October 1986). "Learning representations by back-propagating errors". Nature.