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After submitting a paper to a journal, the paper will be sent to a reviewer by editor in such a way the name of authors will be hidden for referee. In some cases in the list of references, sometimes there exists papers belong to authors which cite them by authors in the paper. In other words, it is not difficult to extract the name of authors from the reference list, isn't it? How can this issue be managed (in the case of importance of not-knowing the name of authors for referee)?