The Norwegians Wikipedians maintain a list of research done by Norwegian researchers and researchers based in Norway on https://no.wikipedia.org/wiki/Wikipedia:Wikipedia-forskning

That list contains quite a few master's theses, a lot of papers studying the utility of Wikipedia in education, all of my published work. I do not know any Norwegian academics studying gender gap issues in Wikipedia.  You might want to get in touch Astrid Carlsen at Wikimedia Norway (astrid@wikimedia.no) and ask if she knows anyone, tell her I said hi.

Cheers,

Morten