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ISSN:1464-5211|31|5|639-649

Taylor & Francis Ltd‎(2000)‎

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By Kelarev A.   Yearwood J.   Watters P.   in Semigroup Forum

ISSN:0037-1912|82|2|242-251

Springer Publishing Company ‎(2011)‎

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By Kelarev A.   Yearwood J.   Watters P.   Wu X.   Abawajy J.   Pan L.   in Semigroup Forum

ISSN:0037-1912|81|1|162-171

Springer Publishing Company ‎(2010)‎

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By Watters P.A.   Patel M.   in Brain and Language

ISSN:0093-934X|80|3|328-339

Academic Press‎(2002)‎

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