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First Author:
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| Sergio Da Silva |
| Department of Economics, Federal University of Rio Grande Do Sul, Brazil |
| SergioDaSilva@angelfire.com |
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| Rua Sofia Veloso 156/804 |
| Porto Alegre, 90050140, Brazil |
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| +55 51 3316 4164(Phone) |
| +55 51 3316 4164(Fax) |
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Second Author:
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| Annibal Figueiredo |
| Department of Physics, University of Brasilia |
| annibal@fis.unb.br |
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Third Author:
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| Iram Gleria |
| Department of Physics, Federal University of Alagoas |
| iram@fis.ufal.br |
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Fourth Author:
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| Raul Matsushita |
| Department of Statistics, University of Brasilia |
| raulmta@unb.br |
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