Maisak, M.S., Haag, J., Ammer, G., Serbe, E., Meier, M., Leonhardt, A., Schilling, T., Bahl, A., Rubin, G.M., Nern, A., Dickson, B.J., Reiff, D.F., Hopp, E., Borst, A. (2013). A directional tuning map of Drosophila elementary motion detectors.
Nature 500(7461): 212--216.