Document Type

Article

Publication Date

2002

Comments

This article was originally published in Electronic Notes in Theoretical Computer Science, volume 68, number 1, in 2002. DOI: 10.1016/S1571-0661(05)80502-X

Copyright

Elsevier

Creative Commons License

Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License.

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