@article{832296,
  author = {B Anderson and P Haljan and C Wieman and Eric Cornell},
  title = {Vortex precession in Bose-Einstein condensates: Observations with filled and empty cores},
  year = {2000},
  number = {85},
  month = {2000-01-01 00:01:00},
  publisher = {Physical Review Letters},
  language = {en},
}