author        = "Xu, F.  and Siersch, N. C.  and Gréaux, S.  and
                       Rivoldini, A.  and Kuwahara, H.  and Kondo, N.  and Wehr,
                       N.  and Menguy, N.  and Kono, Y.  and Higo, Y.  and Plesa,
                       A. -C.  and Badro, J.  and Antonangeli, D.",
      title         = "{Low Velocity Zones in the Martian Upper Mantle
                       Highlighted by Sound Velocity Measurements}",
      year          = "2021",