@inproceedings{Biedermann97a,
  address = {Aachen},
  author = {Biedermann, Klaus},
  booktitle = {General algebra and applications in discrete mathematics},
  editor = {Denecke, K. and L{\"u}ders, O.},
  interhash = {d4b70c32999abf763b635b2203ca5081},
  intrahash = {491dfd061877ee08c8018136df5ad66a},
  pages = {23-33},
  publisher = {Shaker Verlag},
  title = {Triadic Galois connections},
  year = 1997
}