@inproceedings{RoessnerSeifert2005,
  author    = {Carsten R{\"o}ssner and Jean-Pierre Seifert},
  title     = {On the hardness of approximating shortest integer relations among rational numbers},
  booktitle = {Computing: The Australasian Theory Symposium (CATS) '96},
  url       = {http://www.mi.informatik.uni-frankfurt.de/research/papers.html},
  year      = {2005},
}