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Online resource available at:
DOAJ Directory of Open Access Journals
Available from 2003.
Online resource available at:
ROAD: Directory of Open Access Scholarly Resources
Available from 2003.
Online resource available at:
SciELO Brazil
Available from 2003 volume: 22 issue: 1.
Online resource available at:
SciELO Complete
Available from 2006 until 2010.
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