Book announcements

<span title="">1991</span> <i title="Elsevier BV"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/lx7dev2le5anbg6oarljwh7lie" style="color: black;">Discrete Applied Mathematics</a> </i> &nbsp;
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1016/0166-218x(91)90051-w">doi:10.1016/0166-218x(91)90051-w</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/oqpbdxzpljcihecb5tgyinpmva">fatcat:oqpbdxzpljcihecb5tgyinpmva</a> </span>
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