@article{Spica:1796,
      author        = "Spica, Zack and Caudron, Corentin and Perton, Mathieu and
                       Lecocq, Thomas and Camelbeeck, Thierry and Legrand, Denis
                       and Pina-Flores, José and Iglesias, Arturo and Syahbana,
                       Devy Kamil",
      title         = "{Velocity models and site effects at Kawah Ijen volcano
                       and Ijen caldera (Indonesia) determined from ambient noise
                       cross-correlations and directional energy density spectral
                       ratios}",
      year          = "2015",
}