@article{Kaczan:103673,
      author = {Kaczan, David and Swallow, Brent M. and Adamowicz, Wiktor  L.},
      title = {{Payment for Ecosystem Services (PES) scheme design in  rural Tanzania: Famers’ preferences for enforcement and  payment options}},
      pages = {40},
      year = {2011},
      note = {Replaced with revised version of paper 09/27/11.},
}