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PORTUGALIAEMATHEMATICA Vol. 51, No. 4, pp. 553-570 (1994)  | 
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A Class of Quasi-Adequate Transformation SemigroupsAbdullahi UmarDepartment of Mathematics, Ahmadu Bello University,Zaria - NIGERIA Full text of the article: 
 Electronic version published on: 29 Mar 2001. This page was last modified: 27 Nov 2007. 
© 1994 Sociedade Portuguesa de Matemática
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