* [[Carolus Pollard]], [[Ioannes Sag|Ivan A. Sag]] ([[1987]]): ''Information-based Syntax and Semantics. Volume 1: Fundamentals''. Stanford: CSLI Publications.
* [[Carolus Pollard]], [[Ioannes Sag|Ivan A. Sag]] ([[1994]]): ''Head-Driven Phrase Structure Grammar''. [[Sicagum|Sicagi]]: University of Chicago Press. ([http://cslipublications.stanford.edu/site/0226674479.html])
* [[Ioannes Sag|Ivan A. Sag]], [[Thomas Wasow]], [[Aemilia Bender]] ([[2003]]): ''Syntactic Theory: a formal introduction, Second Edition''. [[Sicagum|Sicagi]]: University of Chicago Press. ([http://cslipublications.stanford.edu/site/1575864002.html])
* {{cite encyclopedia
| last = Levine
| first = Robertus D.
| authorlink = Robertus D. Levine
| coauthors = W. Detmar Meurers
| editor = Keith Brown
| encyclopedia = Encyclopedia of Language and Linguistics
| title = Head-Driven Phrase Structure Grammar: Linguistic Approach, Formal Foundations, and Computational Realization
