@article{BalckeHahnOswald2011,
  author    = {Gerd U. Balcke and M. Hahn and Sascha Oswald},
  title     = {Nitrogen as an indicator of mass transfer during in-situ gas sparging},
  journal   = {Journal of contaminant hydrology},
  volume    = {126},
  number    = {1-2},
  pages     = {8 -- 18},
  doi       = {10.1016/j.jconhyd.2011.05.005},
  year      = {2011},
}