@article{DzhunushalievSchmidt1999,
  author    = {Vladimir Dzhunushaliev and Hans-J{\"u}rgen Schmidt},
  title     = {4D wormhole with signature change in the presence of extra dimensions},
  journal   = {General relativity and quantum cosmology : preprints gr-qc},
  series    = {VierD wormhole with signature change in the presence of extra dimensions},
  volume    = {9908076},
  url       = {http://xxx.soton.ac.uk/form/gr-qc?},
  year      = {1999},
}