@inproceedings{Gibbons93:Computing,
  title = "Computing Downwards Accumulations on Trees Quickly",
  author = "Jeremy Gibbons",
  year = "1993",
  address = "Brisbane",
  booktitle = "16th Australian Computer Science Conference",
  editor = "Gopal Gupta and George Mohay and Rodney Topor",
  month = "feb",
  pages = "685--691",
}