http://journals.sagepub.com/doi/abs/10.1068/ii59 (Abstract)
Thornton, I., Srismith, D., Oxner, M., & Hayward, W. (2014). Establishing a Majority: Observer Race Influences Estimates of Crowd Ethnicity. i-Perception, 5(5), 490 -490. doi:10.1068/ii59.