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 Porto Alegre: Sociedade Brasileira de Computação, 
	2007
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 p. 51-64. 
			ISSN 2326-5434. 
		DOI: <a href="https://doi.org/10.5753/wesaac.2007.33034">https://doi.org/10.5753/wesaac.2007.33034</a>.