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注释
1.可以从网上以及其他的手段来得到具体的描述、扩展卡以及工具；例如：
[6],[3],[12].
2.查看 [6] 已得到估算方法的概述。
3.参考在 Diev [11] 中发现的同一个人。
4.[1], p. 127;同样比较