author        = "Decin, L. and Royer, P. and Cox, N. L. J. and
                       Vandenbussche, B. and Ottensamer, R. and Blommaert, J. A.
                       D. L. and Groenewegen, M. A. T. and Barlow, M. J. and Lim,
                       T. and Kerschbaum, F. and Posch, T. and Waelkens, C.",
      title         = "{Discovery of multiple dust shells beyond 1 arcmin in the
                       circumstellar envelope of IRC +10216 using Herschel/PACS}",
      year          = "2011",