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Skiena, Steven S. (2008). The Algorithm Design Manual. Springer-Verlag London. http://ezproxy.lib.le.ac.uk/login?url=http://dx.doi.org/10.1007/978-1-84800-070-4
Spohr, Dennis. (2012). Towards a multifunctional lexical resource: design and implementations of a graph-based lexicon model: Vol. Lexicographica. Series maior. De Gruyter. http://site.ebrary.com/lib/leicester/Doc?id=10534137
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