After finishing Conzelmann, I started reading up on the Tübingen School and the subsequent Dutch Radicals that took the former's ideas to their ultimate natural implications, namely, casting doubt on the authenticity of not only the pastoral epistles, but also of the hallowed "seven genuine letters" of Paul. Even the big four letters (i.e. 1 & 2 Corinthians, Galatians, & Romans), Van Manen, Loman and their colleagues concluded, are not articles from the mid first century apostle to the gentiles, to whom they have been attributed since the catholization of "orthodoxy" in the mid to late second century.
There's a treasure trove of articles on the subject over at Robert Price's wonderful Journal of Higher Criticism. Anyone interested in this stuff should go check it out.
- Hermann Detering - The Dutch Radical Approach to the Pauline Epistles
- Darrell J. Doughty - Pauline Paradigms and Pauline Authenticity
- Robert M. Price - The Evolution of the Pauline Canon
- G. A. van den Bergh van Eysinga - The Spuriousness of the Pauline Epistles.
- Thomas Whittaker - An Exposition of Van Manen's Analysis of the Epistle to the Romans
- W. C. Van Manen - The Pauline Writings
- F. C. Baur - The Epistle to the Philippians
They are really very well researched and well argued essays. I highly recommend them.
I find what they say convincing; I've been ruminating on these and expect to write a few thoughts on this topic soon.