Pick, B Max Planck Institute for Biological Cybernetics, Max Planck Society; Former Department Neurophysiology of Insect Behavior, Max Planck Institute for Biological Cybernetics, Max Planck Society;
https://link.springer.com/content/pdf/10.1007/BF00344749.pdf (Publisher version)
Pick, B. (1976). Visual pattern discrimination as an element of the fly's orientation behaviour. Biological Cybernetics, 23(3), 171-180. doi:10.1007/BF00344749.