Müller, Stefan, Anne Abeillé, Robert Borsley, and Jean-Pierre Koenig. Head-driven Phrase structure grammar: the handbook In Empirically Oriented Theoretical Morphology and Syntax . Berlin: Language Science Press, 2021.

Crysmann, Berthold. "Morphology." In Head-Driven Phrase Structure Grammar. The Handbook, edited by Stefan Müller, Anne Abeillé, Robert Borsley and Jean-Pierre Koenig, 947-999. Empirically Oriented Theoretical Morphology and Syntax. Language Science Press, 2021.

Crysmann, Berthold, and Robert Borsley. "Unbounded Dependencies." In Head-Driven Phrase Structure Grammar: The handbook, edited by Stefan Müller, Anne Abeillé, Robert Borsley and Jean-Pierre Koenig, 537-594. Empirically Oriented Theoretical Morphology and Syntax. Language Science Press, 2021.

Bonami, Olivier, Robert Borsley, and Maggie Tallerman. On Pseudo-Non-Finite Clauses in Welsh In Proceedings of the HeadLex 2016 Conference. Stanford: CSLI Publications, 2016.

Abeillé, Anne, and Robert Borsley. "Comparative correlatives and parameters." Lingua (2008): 1139-1157.