@article{NassvanGasseltJaumannetal.2011,
  author    = {Andrea Nass and S. van Gasselt and Ralf Jaumann and Hartmut Asche},
  title     = {Implementation of cartographic symbols for planetary mapping in geographic information systems},
  journal   = {Planetary and space science},
  volume    = {59},
  number    = {11-12},
  pages     = {1255 -- 1264},
  doi       = {10.1016/j.pss.2010.08.022},
  year      = {2011},
}