@INCOLLECTION{mueller-etal_14,
  author = {M\"uller, Silvia and Brockmann, Jan Martin and Schuh, Wolf-Dieter},
  title = {Consistent Combination of Gravity Field, Altimetry and Hydrographic
	Data},
  booktitle = {Gravity, Geoid and Height Systems (GGHS 2012), IAG Symposia},
  publisher = {Springer},
  year = {2014},
  editor = {Marti, U.},
  volume = {141},
  series = {Lecture Notes in Earth Sciences},
  pages = {267-273},
  doi = {10.1007/978-3-319-10837-7_34}
}