1. Untangling the imperative puzzle;Alcázar, Asier,2008
2. The syntax of imperatives;Alcázar, Asier,2014
3. The syntax of agreement and concord;Baker, Mark,2008
4. Characteristics of Mandarin imperatives;Chen-Main, Joan,2005
5. On the typology of wh-questions;Cheng, Lisa Lai-Shen,1997