Page 2 - Textos de Matemática Vol. 42
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Comissa˜o Editorial
Ana Paula Santana
Ju´lio Severino Neves
Maria Paula Martins Serra de Oliveira
Financial support from the Centre of Mathematics of the University of Coimbra (CMUC/FCT) for the edition of this volume of Textos de Matem´atica is gratefully acknowledged.
