1. Altmann, G. (1997). The ascent of Babel. Oxford University Press.
2. American Psychiatric Association. (2000). Diagnostic and statistical manual of mental disorders (4th ed., text rev.). American Psychiatric Pub.
3. American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders (5th ed.). Washington, DC: American Psychiatric Pub.
4. Bates, E., & Goodman, J. C. (1997). On the inseparability of grammar and the lexicon: Evidence from acquisition, aphasia and real-time processing. Language & Cognitive Processes, 12(5/6), 507–584.
5. Carr, L., & Johnston, J. (2001). Morphological cues to verb meaning [Article]. Applied Psycholinguistics, 22(4), 601–618.