Have added a few items to the Pastoral Epistles page:
Robert H. Gundry, “The Form, Meaning and Background of the Hymn Quoted in 1 Timothy 3:16.” In Apostolic History and the Gospel: Biblical and Historical Essays Presented to F. F. Bruce on His 60th Birthday. Eds. Woodrow Ward Gasque and Ralph P. Martin. Exeter: Paternoster, 1970, pp. 203-222.
Luke Timothy Johnson, “Pastoral Letters: 1 Timothy, 2 Timothy, Titus.” In The Writings of the New Testament: An Interpretation. London: SCM; Minneapolis: Fortress Press, 1999, pp. 423-452.