@article{1017,
  author = {P. Engels and I. Coddington and P. Haljan and V. Schweikhard and Eric Cornell},
  title = {Observation of Long-Lived Vortex Aggregates in Rapidly Rotating Bose-Einstein Condensates},
  year = {2003},
  journal = {Physical Review Letters},
  volume = {90},
  month = {2003-05},
  issn = {0031-9007},
  doi = {10.1103/PhysRevLett.90.170405},
}