Not going to give a definite answer (yes or no) as I'm a sort of outsider, but I wanted to give my insight hoping that it helps.
I'm a moderator on Linguistics SE and there we allow reference requests. There are two main reasons why we do:
- The site is relatively small and such questions are not so frequent.
- The papers are going to be of a small number anyway.
If and when the site grows and the number increases uncomfortably, then we'll cut them. But if you check the link I gave, they do not go over 5 answers and only one actually reaches that number.
I'll get to the point.
Questions get Not Constructive not simply because they ask for a list. That is not sufficient. If the questions asks for a list, but the list is going to be of 4/5 elements, then the question is fine as it's narrow enough.
So what I think is that you should consider this: if you allow such questions on Politics, what kind of answers are you reasonably expecting?
I'm not aware of how many politics-related texts, papers, articles or books there are, but if you know that this is going to be a problem, then say no. You might give it a try and see how it goes.
In any case, if the site decides to allow them, then I suggest to put some requirements (make the question as narrow as reasonably possible).