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articles a an the Rules for article use Handout with Japanese and English about English article rules the, a/an One of my students told me they were confused about when to use articles or not, or what articles to use, and I didn't know how to answer easily, and when I looked it up, the answers were very confusing and used complicated English to explain the rules
article in a periodical adalah Conference proceedings that are published as part of an issue in a journal are to be cited the same way as a journal article for more, see section 4.3.5.2: Periodicals in the ACS Guide to Scholarly Communication