Categorical perception in American Sign Language, Language and Cognitive Processes, vol.18, issue.1, pp.21-45, 2003. ,
Preliminaries to Speech Analysis. The Distinctive Features and their Correlates, 1952. ,
Preliminaries to a distinctive feature analysis of handshapes in American Sign Language, Cognitive Psychology, vol.8, pp.263-289, 1976. ,
Clues from the Difference between Signed and Spoken Language Signed and Spoken Languages : Biological Constraints on Linguistic Form, pp.29-40, 1980. ,