E. Thomas

Understanding of visual attention by adult humans (Homo sapiens): a partial replication of Povinelli, Bierschwale, and Cech (1999).

David A. Leavens, A. Rivers, D. Leavens, 2008, Journal of comparative psychology.

Control of attention in the processing of temporal and spatial information in complex visual patterns.

N. Cantor, E. Thomas, 1977, Journal of experimental psychology. Human perception and performance.