ffnet was created in the hope that it will be useful. If you find it really is and you are going to publish some ffnet generated results, please cite it:
\bibitem[FFNET, 2011]{FFNET} Wojciechowski, M.,
Feed-forward neural network for python,
Technical University of Lodz (Poland),
Department of Civil Engineering, Architecture and Environmental Engineering,
http://ffnet.sourceforge.net/, ffnet-0.7, August 2011
You can also look at the growing list of publications which use (and cite) ffnet.