@InProceedings{AlsBenRau99,
  author =       "Alstrup and Ben-Amram and Rauhe",
  title =        "Worst-case and Amortised Optimality in Union-Find
                 (Extended abstract)",
  booktitle =    "Proceedings of the Thirty-First Annual {ACM} Symposium
                 on Theory of Computing ({STOC}'99)",
  ISBN =         "1-58113-067-8",
  month =        may,
  publisher =    "Association for Computing Machinery",
  address =      "New York",
  year =         "1999"
}