An example here:
https://he.wikipedia.org/wiki/%D7%92%27%D7%95%D7%A0%D7%AA%D7%9F_%D7%A4%D7%A8...
I couldn't find a description of the "previous" parameter. Does someone know (and how do I find this out by myself)?
(I was looking here: https://www.mediawiki.org/wiki/Manual:Parameters_to_index.php but could not find anything, so I assume this comes from some extension, but I do not know how to figure that out)