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HAWKINS Frank H., 1987, Gower technical press [amazon.com]  [amazon.co.uk]  [amazon.fr]  [proxis.be]
KNUTH Donald E., 2001, University of Chicago Press [amazon.com]  [amazon.co.uk]  [amazon.fr]  [proxis.be]
BUZAN Tony, 2003, BBC Books [amazon.com]  [amazon.co.uk]  [amazon.fr]  [proxis.be]
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