Snoeck Henkemans, A. F., van Eemeren, F. H., & Grootendorst, R. (2003). Indicators of argumentation structures. In J. A. Blair, D. Farr, H. V. Hansen, R. H. Johnson, & C. W. Tindale (Eds.), Informal Logic at 25: proceedings of the Windsor Conference (pp. [1-9]). OSSA.