I have an article in Paperpile which refers to a Nielsen report. However that Nielsen report is no longer available, therefore I need to cite the article instead. So, the inline citation should look something like “Nielsen, cited by Article, date” I think.
However I don’t know how to do that within Paperpile.
So the question is, how do I cite a source within an article, where the article is the piece of content I have within Paperpile.