Shepard, E., Portugal, S. J., Ricketts, R. L., Chappell, J., White, C. R., & Biro, D. (2017). Boldness traits, not dominance, predict exploratory flight range and homing behaviour in homing pigeons. Philosophical Transactions of the Royal Society B: Biological Sciences, 372(1727), p. 20160234. doi:10.1098/rstb.2016.0234

Shepard, Emily, Steven J. Portugal, Rhianna L. Ricketts, Jackie Chappell, Craig R. White, and Dora Biro. "Boldness Traits, Not Dominance, Predict Exploratory Flight Range and Homing Behaviour in Homing Pigeons." Philosophical Transactions of the Royal Society B: Biological Sciences 372, no. 1727 (2017): 20160234.

Shepard, Emily, et al. "Boldness Traits, Not Dominance, Predict Exploratory Flight Range and Homing Behaviour in Homing Pigeons." Philosophical Transactions of the Royal Society B: Biological Sciences 372.1727 (2017): 20160234.