@article{GrafReinhardtMuelleretal.2006,
  author    = {Oliver Graf and Joachim Reinhardt and Berndt M{\"u}ller and Walter Greiner and Gerhard Soff},
  title     = {Angular correlations of coincident electron-positron pairs produced in heavy-ion collisions with nuclear time delay},
  journal   = {Physical review letters},
  volume    = {61},
  number    = {25},
  pages     = {2831 -- 2834},
  url       = {http://link.aps.org/abstract/PRL/v61/p2831},
  year      = {2006},
}