@ARTICLE{roese-koerner-etal_12a,
  author = {Roese-Koerner, Lutz and Devaraju, Balaji and Sneeuw, Nico and Schuh,
	Wolf-Dieter},
  title = {A stochastic framework for inequality constrained estimation},
  journal = {Journal of Geodesy},
  year = {2012},
  volume = {86},
  pages = {1005 --1018},
  month = {11},
  doi = {10.1007/s00190-012-0560-9}
}