B. M. METZGER, The New Testament: Its Background Growth and Content (3rd Ed.), Nashville Abingdon Press 2003, 255-258;
R. HAYS, “PISTIS and Pauline Christology: What Is at Stake?” in E. E. JOHNSON and D. M. HAY (eds.), Pauline Theology, Volume 4: Looking Back, Pressing On. Atlanta:Scholars, 1997, 35-60.