近期在审核博士生发表文章的过程中，发现有一些杂志由于自引率过高，导致影响因子无法查询，请各位博士生在投稿时避免在以下杂志进行投稿，特此通知。

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    Due to the significant effect of self citations on their Impact Factors, metrics for a number of titles were not published in the 2008 JCR.  Suppressed titles were found to have exceptionally high self citation rate, some over 90% This level of self citation  has a profound effect on the rank of the journal in its category and does not reflect accurately the journal’s true participation, by way of citation, in the scholarly literature of its subject.  The meaning of Impact Factor as an objective and integral measure of a journal’s participation in the scholarly literature on a particular subject becomes questionable at this level of self citation.  It is for this reason that the following journals do not  appear in the 2008 JCR.  JCR Staff will monitor these journals going forward and the titles will be re-listed in a future edition of JCR when the problem of excessive self citations has been resolved.  In the meantime, coverage of these journals in Web of Science and other Thomson Reuters products is not changed.