http://www.nature.com/nature/journal/v535/n7610/full/nature18609.html?foxtrotcallback=true (Publisher version)
Ding, H., Smith, R., Poleg-Plosky, A., Diamond, J. S., & Briggman, K. L. (2016). Species-specific wiring for direction selectivity in the mammalian retina. Nature, 535, 105-110. doi:doi:10.1038/nature18609.