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.

2007	-	The Evolution of Human Speech: Its Anatomical and Neural Bases - Lieberman	::	1
		LIEBERMAN P, E. T. KAKO, J. FRIEDMAN, G. TAJCHMAN, L. S. FELDMAN AND E. B. JIMINEZ. 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	::	6
		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	::	2
		4. Lieberman, P. et al. Brain Lang 43, 169--189 (1992).