@inproceedings{paper28,
  title = "Interaction Categories (Extended Abstract)",
  author = "S. Abramsky",
  year = "1993",
  booktitle = "Theory and Formal Methods 1993",
  editor = "G. L. Burn and S. J. Gay and M. D. Ryan",
  pages = "57-69",
  publisher = "Springer-Verlag",
}