@article{TronickePaascheBoeniger2012,
  author    = {Jens Tronicke and Hendrik Paasche and Urs B{\"o}niger},
  title     = {Crosshole traveltime tomography using particle swarm optimization a near-surface field example},
  journal   = {Geophysics},
  volume    = {77},
  number    = {1},
  pages     = {R19 -- R32},
  doi       = {10.1190/GEO2010-0411.1},
  year      = {2012},
}