1. Dua, D. and Karra Taniskidou, E. (2017). UCI Machine Learning Repository
https://archive.ics.uci.edu/ml/datasets/iris
. Irvine, CA: University of California, School of Information and Computer Science.
2. Diminishing Returns
https://en.wikipedia.org/wiki/Diminishing_returns
3. Joseph Giarratano, Gary Riley, Expert Systems: Principles and Programming, PWS Publishing Company, 1994.
4. David Wolpert, William Macready, No Free Lunch Theorems for Optimization, IEEE Transactions on Evolutionary Computation, Vol. 1, No. 1, April, 1997.