@conference{Cai-Cer-Sas-Tre-Zid-2015-1,
    author={J.-B. Caillau and M. Cerf and Achille Sassi and E. Trélat and 
           H. Zidani },
    title={Optimisation d’un lanceur },
    publisher={SMAI 2015 (Les Karellis) },
    year={2015 },
    month={6},
}