@inproceedings{Bok-Cri-Lau-Zid-2012,
    author={Olivier Bokanowski and Emiliano Cristiani and Julien 
           Laurent-Varin and Hasnaa Zidani },
    title={Hamilton-Jacobi-Bellman approach for the climbing problem for 
           multi-stage launchers },
    organization={20th International Symposium on Mathematical Theory of 
           Networks and Systems (MTNS'2012) },
    year={2012 },
    pages={8 pages},
}