Givón, Talömy 1983, ‘Topic continuity in discourse: an introduction’. Givón, Talmy (ed.), Topic continuity in discourse. A quantitative cross-linguistic study. Amsterdam & Philadelphia: J. Benjamins; 1-42.

Lambrecht, Knud 1994, Information structure and sentence form. Topic, focus and the mental representations of discourse referents. Cambridge: Cambridge University Press.