@article{6876,
  author = {J. Williams and Murray Holland},
  title = {Preparing topological states of a Bose-Einstein condensate},
  year = {1999},
  journal = {Nature},
  volume = {401},
  pages = {568-572},
  month = {1999-10},
  issn = {00280836},
  doi = {10.1038/44095},
}