I recently finished my PhD, and now I'm in the process of submitting a journal article on the work I did in the final few months of my degree. This work is an extension to some conference papers that I'd published earlier, and so I've cited them in my journal article stating how the submitted work differs from the published material. When I submitted the article to the journal, I mentioned in a cover letter that the same results/algorithms exist in my PhD dissertation.
After submission, I received a note from the journal to also cite my own PhD dissertation in the article, as there is a fair bit of similarity. The note said:
You can resubmit after you have referenced the original article, and explained in your new article how this new work builds on your previous publication(s).
Considering the work presented in the journal article is not really an extension, and is pretty much the same as in the dissertation, how do I properly reference it? In my experience, I have not seen papers where the authors cited their own dissertation in the text.