If you publish a research paper using RoboGen please cite:

RoboGen: Robot Generation through Artificial Evolution.
J. Auerbach, D. Aydin, A. Maesani, P. Kornatowski, T. Cieslewski, G. Heitz, P. Fernando, I. Loshchilov, L. Daler and D. Floreano.
Artificial Life 14: International Conference on the Synthesis and Simulation of Living Systems, New York, NY, USA, July 30-August 2, 2014.

or

Inquiry-Based Learning with RoboGen: An Open-Source Software and Hardware Platform for Robotics and Artificial Intelligence
J. E. Auerbach, A. Concordel, P. M. Kornatowski, D. Floreano.
IEEE Transactions on Learning Technologies. 2018. DOI : 10.1109/TLT.2018.2833111.