Wes Avram, “2 Corinthians 4:1–18,” Interpretation 55 (2001) 70–73.
Douglas A. Campbell, “2 Corinthians 4:13: Evidence in Paul that Christ Believes,” Journal of Biblical Literature 128 (2009) 337–56.
George W. MacRae, “Anti-Dualist Polemic in 2 Cor 4:6?” in F. L. Cross, ed., Studia Evangelica IV/1: The New Testament Scriptures (TU 102; Berlin: De Gruyter, 1968) 420–31.