Chown, E., Booker, L.B., & Kaplan (2002). Perception, planning, and cognitive maps. Behavioral and Brain Sciences, 24:5, pp. 882.
Chown, E., & Kaplan, S. (1992). Active symbols, limited storage, and the power of natural intelligence. Behavioral and Brain Sciences, 15, 442-443.
Chown, E. (1995). Reverberation reconsidered: On the path to cognitive theory. Behavioral and Brain Sciences, 18, 628-629.