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Often, a paper is submitted to a journal, rejected, then sent to a different journal. Each journal has different style guides. In theory, changing the style should be as easy as changing the document class. But in practice, this is never that easy. Each journal has several peculiarities such as: how exactly the author names are specified, how keywords are specified, whether "cite" or "citep" or "citeN" should be used for citations, etc. After doing such technical changes manually several times, I wonder: are there any automatic converters that take a LaTeX file in e.g. the format of e.g. ACM/Springer/Elsevier, and converts it to the format required by a different publisher?