There's a Professor at Georgia State U whose research specialization is poly. She's completing a longitudinal study on children of poly families, but it hasn't been published yet. She might have some ideas for you on what is out there comparing Poly to Feminist Theory.
I'm working on Religion papers at the moment and actively avoiding the fact that I have to delve into Feminist theory to work on Feminism in the anabaptist expression of religion. Today, I have the flu. I'm already working on an extension on this project, so I'm going to give myself today to be sick. I raided my Dad's Religion stuff (that's his area of expertise). He would die if I asked him about poly stuff though
Hazard of his being both a Sociologist AND an Ordained Mennonite Minister.