improper problems
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13
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H-INDEX
4
(FIVE YEARS 0)
2017 ◽
Vol 299
(S1)
◽
pp. 191-204
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2013 ◽
Vol 283
(S1)
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pp. 126-138
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2012 ◽
Vol 73
(3)
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pp. 417-424
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1986 ◽
Vol 26
(2)
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pp. 73-79
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1972 ◽
Vol 4
(2)
◽
pp. 157-164
◽