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.
 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.