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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (683.496 KB) | DOI: 10.26740/jpte.v11n02.p293-303
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1501.341 KB) | DOI: 10.26740/jpte.v10n02.p113-122
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jte.v12n2.p6-13
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jte.v13n1.p49-54
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