@article{HamannTronicke2014,
  author    = {G{\"o}ran Hamann and Jens Tronicke},
  title     = {Global inversion of GPR traveltimes to assess uncertainties in CMP velocity models},
  journal   = {Near surface geophysics},
  volume    = {12},
  number    = {4},
  pages     = {505 -- 514},
  doi       = {10.3997/1873-0604.2014005},
  year      = {2014},
}