@incollection{LAMBERT13,
   author = "J.-C. Lambert and C. de Clercq and T. von Clarmann",
   title  = "Combining and Merging Water Vapour Observations: {A}
             Multi-dimensional Perspective on Smoothing and Sampling Issues",
   booktitle= "Monitoring Atmospheric Water Vapour, Ground-Based Remote
             Sensing and In-situ Methods",
   publisher= "Springer Verlag",
   editor = "N. K{\"a}mpfer",
   pages  = "215-242",
   address= "ISSI Scientific Report Series, {V}ol. 10",
   year   = "2013"    }