ppe method
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H-INDEX
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2008 ◽
Vol 600-603
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pp. 521-524
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1999 ◽
Vol 79
(11)
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pp. 1361-1366
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1992 ◽
Vol 31
(S1)
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pp. 38
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1991 ◽
Vol 6
(8)
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pp. 1711-1714
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Keyword(s):