van Eemeren, F. H., and R. Grootendorst. “The Relevance Problem in the Analysis of Argumentative Texts - A Pragma-Dialectical Reconstruction”. HERMES - Journal of Language and Communication in Business, vol. 3, no. 5, July 1990, pp. 57-68, doi:10.7146/hjlcb.v3i5.21437.