P. Y. K.  Chau, Cole, M., Massey, A. P., Montoya, M., and O'Keefe, R. M., ?Cultural Differences in the Online Behavior of Consumers?, Communications of the ACM, vol. 45, no. 10, pp. 138-143, 2002.

R. M.  O'Keefe, Cole, M., Chau, P., Massey, A. P., Montoya, M., and Perry, M., ?From the User Interface to the Customer Interface: Results from a Global Experiment?, International Journal of Human-Computer Studies, vol. 53, no. 4, pp. 611-628, 2000.