On February 11-14, 2013, Jürgen Habermas held a masterclass on international law at the Max Planck Institute for Comparative Public Law and International Law, Heidelberg.
In connection with the masterclass the director of the institute Armin von Bogdandy conducted an interview with Habermas. The interview is available here:
"Discourse Theory and International Law" [pdf].
At the masterclass Habermas presented a short paper on his discourse theory. The paper is available in his new book "Im Sog der Technokratie" (Surhkamp Verlag, 2012), entitled "Stickworte zu einer Diskurstheorie des Rechts und des demokratoschen Rechtsstaates".