De Clercq, Karen. "French negation, the Superset Principle and feature conservation." In Cycles in Language Change, edited by Miriam Bouzouita, Anne Breitbarth, Lieven Danckaert and Elisabeth Witzenhausen, 199-227. Oxford: Oxford University Press, 2019.

Siegal, Elitzur Bar- Asher, and Karen De Clercq. "From negative cleft to external negator." In Cycles in Language Change, edited by Miriam Bouzouita, Anne Breitbarth, Lieven Danckaert and Elisabeth Witzenhausen, 228-248. Oxford: Oxford University Press, 2019.

Mapping linguistic data. Essays in honour of Liliane Haegeman, Edited by Metin Bagriacik, Anne Breitbarth and Karen De Clercq., 2019.

Breitbarth, Anne, Karen De Clercq, and Liliane Haegeman. "The syntax of polarity emphasis." Lingua 128 (2013): 1-8.