@article{PaascheTronicke2014,
  author    = {Hendrik Paasche and Jens Tronicke},
  title     = {Nonlinear joint inversion of tomographic data using swarm intelligence},
  journal   = {Geophysics},
  volume    = {79},
  number    = {4},
  pages     = {R133 -- R149},
  doi       = {10.1190/GEO2013-0423.1},
  year      = {2014},
}