@Inproceedings{doerfel2011contextbased,
  author = {Doerfel, Stephan},
  title  = {A Context-Based Description of the Doubly Founded Concept Lattices in the Variety Generated by M_3},

  year   = {2011},
  number = {},
  url    = {http://dx.doi.org/10.1007/978-3-642-20514-9_9},
  doi = {10.1007/978-3-642-20514-9_9},
  const  = {\ text}
}