Indicates the publication information of the cited document. "14(2)" in the citation of a paper usually indicates the publication information of the cited document, where the numbers represent the volume number and issue number of the cited document. Specifically, "14" represents the volume number of the cited document, which means that the document is 14 of the journal to which it belongs, while "(2)" represents the issue number, which means the second issue of the journal to which it belongs. This information helps readers to find the specific location of the cited documents, so as to better understand and verify the quoted contents.