Buchner, E Former Department Neurophysiology of Insect Behavior, Max Planck Institute for Biological Cybernetics, Max Planck Society; Max Planck Institute for Biological Cybernetics, Max Planck Society;
https://link.springer.com/content/pdf/10.1007/BF00360648.pdf (Publisher version)
Buchner, E. (1976). Elementary movement detectors in an insect visual system. Biological Cybernetics, 24(2), 85-101. doi:10.1007/BF00360648.