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First Author:
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| Marcelo Brutti Righi |
| Universidade Federal de Santa Maria |
| marcelobrutti@hotmail.com |
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| Sala 502, Sala 502 |
| Santa Maria, 97015372, Brazil |
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| 5555-91948664(Phone) |
| 5555-91948664(Fax) |
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Second Author:
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| Paulo Sergio Ceretta |
| Universidade Federal de Santa Maria |
| ceretta10@gmail.com |
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