@article{DanosGreinerRafelski2006,
  author    = {Michael Danos and Walter Greiner and Johann Rafelski},
  title     = {Fields nonlocal in Clifford space. I. Classical Gauge-invariant nonlinear field theory},
  journal   = {Physical review D},
  volume    = {6},
  number    = {12},
  pages     = {3476 -- 3491},
  year      = {2006},
}