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Author：Pedro Z. Caldeira, Ana Paula Bossler Date：December 30,2019
DOI：http://dx.doi.org/10.26855/er.2019.12.005 5681 Views
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DOI：http://dx.doi.org/10.26855/er.2019.12.004 4848 Views
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DOI：http://dx.doi.org/10.26855/er.2019.12.002 5080 Views
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Author：M. DAHLAN BAHANG, NUR AENI KASIM Date：December 10,2019
DOI：http://dx.doi.org/10.26855/er.2019.12.003 5351 Views
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Author：Steven George Francis Luwingu, Jesca Harriet Audo Date：December 6,2019
DOI：http://dx.doi.org/10.26855/er.2019.12.001 5853 Views
