@article{ReuterWille87,
  author = {Reuter, Klaus and Wille, Rudolf},
  interhash = {c44cd1352f74fad415129167e6afcb55},
  intrahash = {c58d0da7d1936617fde37f8a87c2005f},
  journal = { Acta Sci. Math. },
  pages = { 319-327 },
  title = { Complete congruence relations of concept
      lattices },
  volume = { 51 },
  year = { 1987 }
}