Soul and Elemental Motion in Aristotle’s "Physics VIII 4"
By defending the following views –– that Aristotle identifies the generator and perhaps the obstacle remover (in an extended sense) as an essential cause of the natural sublunary elemental motion in PhysicsVIII 4; that this view is consistent with the view of PhysicsII 1 that the sublunary simple bodies have a principle of internalmotion; and that the sublunary and the celestial elements have a nature in the very same way–– I shall offer what has so far eluded Aristotelian commentators: a consistent interpretation of Aristotle's theory of the natural motions of the sublunaryand alsothe celestialelements.
Katayama, Errol. “Soul and Elemental Motion in Aristotle’s Physics VIII 4.” Apeiron, Vol. 44, 2011, pp. 163-190.