@article{JoRMiCS-01:Adreka-etal,
  author    = {Hajnal Andr{\'e}ka and Judit X.\ Madar\'asz and Istv{\'a}n N{\'e}meti},
  title     = {{Algebras of relations of various ranks, some current trends and applications}},
  journal   = {JoRMiCS},
  volume    = 1,
  pages     = {27--49},
  year      = 2004}