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	year = {2007},
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	doi = {10.1007/s00606-007-0550-1},
	url = {http://link.springer.com/article/10.1007\%2Fs00606-007-0550-1$\#$page-2},
	author = {Nie, Z._L. and Wen, Jun and Sun, H.}
}
@article {19889,
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	year = {1911},
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	chapter = {441},
	url = {http://www.biodiversitylibrary.org/item/7029$\#$page/448/mode/1up},
	author = {L{\'e}veill{\'e}, Hector}
}
@article {19888,
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	author = {Hemsley, William B.}
}
