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Elsevier‎(1996)‎

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By Aarts J.   Fokkink R.   Vermeer J.   in Acta Mathematica Hungarica

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Springer Publishing Company ‎(2002)‎

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By de Groot J.A.M.   Vermeer J.   in Topology and its Applications

ISSN:0166-8641|115|3|343-354

Elsevier‎(2001)‎

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