Are you citing Eureqa in a paper or publication? We greatly appreciate any attribution to Eureqa for your research. Please reference the paper that eventually led to creation of the software and the software itself:
Distilling Free-Form Natural Laws from Experimental Data
Science, Vol. 324, no. 5923, pp. 81 - 85.
Eureqa (Version 0.98 beta) [Software]
Available from www.nutonian.com