@InCollection{boxhammer-schuh:06,
  author    = {Boxhammer, Ch. and W.-D. Schuh},
  title     = {\protect{GOCE} gravity field modeling: computational aspects - free kite numbering scheme},
  booktitle = {Observation of the Earth System from Space},
  year      = {2006},
  editor    = {Rummel, R. and Ch. Reigber and M. Rothacher and G. Boedecker and U. Schreiber and J. Flury},
  publisher = {Springer},
  pages     = {209--224},
  doi       = {10.1007/3-540-29522-4_15},
  address   = {Berlin - Heidelberg}
}