@article{Physics.3.33,
  title = {Observing the dance of a vortex$-${}antivortex pair, step by step},
  author = {Engels, Peter},
  journal = {Physics},
  volume = {3},
  issue = {},
  pages = {33},
  numpages = {1},
  year = {2010},
  month = {Apr},
  doi = {10.1103/Physics.3.33},
  url = {http://link.aps.org/doi/10.1103/Physics.3.33},
  publisher = {American Physical Society}
}