Interesting website which requires much more poking around on my part:
The Oath in Classical Greece
... here's part of the intro blub:

This is the homepage of the Oath in Archaic and Classical Greece Project, based in the Department of Classics, University of Nottingham, directed by Alan H. Sommerstein, and funded by the Leverhulme Trust, which has created a database of all references to oaths in Greek texts of all kinds from the earliest alphabetic inscriptions down to 322 BC, the year of the death of Aristotle and the end of the classical Athenian democracy, and is now engaged in the analysis and interpretation of this evidence, preparing a two-volume study of The Oath in Archaic and Classical Greece (click here for details of this and our other publications).