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http://journals.cambridge.org/action/displayAbstract?aid=293420
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ZOLTÁN FÜREDI,
ANDRÁS GYÁRFÁS
and GÁBOR SIMONYI
(2005).
Connected matchings and Hadwiger's conjecture. Combinatorics, Probability and Computing, 14
,
pp 435-438
doi:10.1017/S0963548305006759