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            <a href="http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.37.3574" target="_top">Simple,
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<li class="listitem">
            <a href="http://books.google.com/books?id=pFSwuqtJgxYC" target="_top">M. Herlihy
            &amp; Nir Shavit.