Thanks a lot! I have now received a reply from the review team.
I am still a little puzzled, though. My app contains an HTML page that is about two screens tall. The text includes references in the format [1,2], and if you scroll down about half a page, there is a reference list with the corresponding numbers and clickable links.
However, the review team wrote: “If the app already includes citations, please provide steps on how to locate them.”
It seems some people have forgotten Steve Jobs’ brilliant iPhone introduction back in 2007 in San Francisco, where he demonstrated smooth, finger-driven page scrolling in Safari.
Pardon the sarcasm — thanks for setting this in motion. I will resubmit and explain in detail how to find the citation list.