论文标题
引用比引用的早？
Citing is earlier than Cited?
论文作者
论文摘要
通常，普遍的论文比引用论文更早。但是我们发现了三个不同的案例，没有发现。在这封信中，我们试图解释原因。但是，当我们研究科学特征时，引用和引用论文之间的负时间滞后可能会误导我们。
Generally, it is common that cited papers are earlier than citing papers. But we found three different cases, with more undiscovered. In this letter, we attempted to explain the reasons. However, negative time lag between citing and cited papers may mislead us when we study the characteristics of science.
