Vern S. Poythress, Structural Approaches to Understanding the Theology of the Apostle Paul (PDF).
This piece is my Th.D. dissertation at the University of Stellenbosch, 1981. Quite a bit of time has passed, but some people have expressed interest in it, and it shows some of the value of a multiperspectival approach applied to the theology of Paul. The piece is too early to interact with the New Perspective on Paul.