By Bayer M.M.   Hetyei G.   in European Journal of Combinatorics

ISSN:0195-6698|22|1|5-26

Elsevier‎(2001)‎

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By Hageman S. J.   Bayer M. M.   Todd C. D.   in Journal of Natural History

ISSN:1464-5262|33|11|1713-1735

Taylor & Francis Ltd‎(1999)‎

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