Context: At UK universities at least, before progressing from the first year of your PhD (or transferring from an MPhil to a PhD), it is required to write a fairly substantial report detailing the research done so far and the outline the research direction over the remainder of the PhD. It's usually known as the Transfer/Confirmation/Upgrade Report.
Is it appropriate to reference these kinds of reports when writing: a) Your own Transfer Report, and b) Published research articles? I have never come across one referenced in a paper before, whereas I have seen references to PhD theses, Masters, and undergraduate dissertations.