@conference{Bok-Cri-Zid-2007,
    author={Olivier Bokanowski and Emiliano Cristiani and Hasnaa Zidani },
    title={An efficient implementation of arrow Band methods for 
           Hamilton-Jacobi-Bellman equations },
    publisher={Introduction to numerical methods for moving boundaries },
    year={2007 },
    month={11},
}