Egelhaaf, M Former Department Information Processing in Insects, 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/BF00339948.pdf (Publisher version)
Egelhaaf, M. (1985). On the neuronal basis of figure-ground discrimination by relative motion in the visual system of the fly II: Figure-detection cells, a new class of visual interneurones. Biological Cybernetics, 52(3), 195-209. doi:10.1007/BF00339948.