@article{KlinSOS04,
  author    = {Bartek Klin},
  title     = {From Bialgebraic Semantics to Congruence Formats},
  journal   = {Electr. Notes Theor. Comput. Sci.},
  volume    = {128},
  number    = {1},
  year      = {2005},
  pages     = {3-37},
  ee        = {http://dx.doi.org/10.1016/j.entcs.2004.09.038}
}