Personhood

Larry Solum periodically provides an introduction to fundamental concepts in legal theory, geared primarily toward law students.  Today's topic is personhood, and the introduction only gives a hint of the concept's depth.  While it's impossible to do justice to the intellectual tradition underlying "personhood" in a blog format, we could at least provide a more robust reading list.  So what sources would Catholic legal theorists add to Solum's bibliography?

Rob