2D skeletal animation "theory" and research

I'm wondering if anyone knows of any academic papers about 2D skeletal animation.

Baiscally i'm thinking about how you could fake 3D in the context of a 2D model but without necessarily hand drawing transformations of the sprites/vector art associated with each "bone" in the skeleton. I'm also interested in basically "cartoon optics" meaning I do not literally want to be able to fake projective geometry with 2D sprites because doing so defeats the purpose of not just using a 3D polygon-based model. I'm interested in heavily stylized art common in Midcentury animatiom, “UPA style …