1
Cyhoeddwyd: 2016.
Links: Cael y testun llawn
2
Cyhoeddwyd: 2005.
Superior document: Linguistik aktuell/Linguistics today, v. 78
Links: Cael y testun llawn
3
Cyhoeddwyd: c2002.
Superior document: Amsterdam studies in the theory and history of linguistic science. Series IV, Current issues in linguistic theory, v. 220
Links: Cael y testun llawn