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<DD>Klaus Simon<BR>
<EM>An Improved Algorithm for Transitive Closure on Acyclic Digraphs</EM><br>
Theoretical Computer Science 58<br>
Automata, Languages and Programming, 376-386, 1986

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<DD>P. Purdom<BR>
<EM>A Transitive Closure Algorithm</EM><br>
BIT, 10, 1970, pp. 76-94.

<p></p><dt><a name="brandes01">54</a>
<dd>Ulrik Brandes<br>
<em>