If you use Flexi for your publications, please cite it. For the general method please cite
Hindenlang, F., Gassner, G. J., Altmann, C., Beck, A., Staudenmaier, M., & Munz, C. D. (2012). . Computers & Fluids, 61, 86-93.
Explicit discontinuous Galerkin methods for unsteady problems
Computers & Fluids, 61, (2012) 86-93
For LES related topics please cite
Beck, A. D., Bolemann, T., Flad, D., Frank, H., Gassner, G. J., Hindenlang, F., & Munz, C. D.
High‐order discontinuous Galerkin spectral element methods for transitional and turbulent flow simulations
International Journal for Numerical Methods in Fluids, 76(8), (2014) 522-548
or use the following Bibtex files
@article{flexi_general,
title={Explicit discontinuous Galerkin methods for unsteady problems},
author={Hindenlang, Florian and Gassner, Gregor J and Altmann, Christoph and Beck, Andrea and Staudenmaier, Marc and Munz, Claus-Dieter},
journal={Computers \& Fluids},
volume={61},
pages={86--93},
year={2012},
publisher={Elsevier}
}
@article{flexi_les,
title={High-order discontinuous Galerkin spectral element methods for transitional and turbulent flow simulations},
author={Beck, Andrea D and Bolemann, Thomas and Flad, David and Frank, Hannes and Gassner, Gregor J and Hindenlang, Florian and Munz, Claus-Dieter},
journal={International Journal for Numerical Methods in Fluids},
volume={76},
number={8},
pages={522--548},
year={2014},
publisher={Wiley Online Library}
}