@BOOK{schuh_96,
  title = {Tailored numerical solution strategies for the global determination
	of the earth's gravity field},
  publisher = {Technische Universit\"at Graz (TUG)},
  year = {1996},
  author = {Schuh, W.-D.},
  volume = {81},
  series = {Mitteilungen der Geod\"atischen Institute},
  address = {Graz},
  url = {ftp://skylab.itg.uni-bonn.de/schuh/Separata/schuh_96.pdf}
}