The set union problem with backtracking

Reference:

Heikki Mannila and E. Ukkonen. The set union problem with backtracking. In Automata, Languages and Programming, Thirteenth International Colloquium, pages 236–243, 1986.

Suggested BibTeX entry:

@inproceedings{muicalp86,
    author = {Heikki Mannila and E. Ukkonen},
    booktitle = {Automata, Languages and Programming, Thirteenth International Colloquium},
    pages = {236-243},
    title = {The set union problem with backtracking},
    year = {1986},
}