Lieberman, P. , Kako, E. T. , Friedman, J. , Tajchman, G. , Feldman, L. S. , and Jimenez, E. B. (1992) Speech production, syntax comprehension, and cognitive deficits in Parkinson's disease. Brain and Language , 43:169--189.

Lieberman, P., Kako, E. T., Friedman, J., Tajchman, G., Feldman, L. S., and Jimenez, E. B. (1992) Speech production, syntax comprehension, and cognitive deficits in Parkinson's disease. Brain and Language, 43:169--189.

2002	-	On the nature and evolution of the neural bases of human language - Lieberman	::	4
		Lieberman P, Kako ET, Friedman J, Tajchman G, Feldman LS, Jiminez EB. 1992. Speech production, syntax comprehension, and cognitive deficits in Parkinson's disease. Brain Lang 43: 169-189.
1994	-	Cognitive defects at altitude - Lieberman,Protopapas,Reed,Youngs,Kanki	::	1
		4. Lieberman, P. et al. Brain Lang 43, 169--189 (1992).