Braitenberg, V Former Department Structure and Function of Natural Nerve-Net, 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/BF00272661.pdf (Publisher version)
Braitenberg, V. (1970). Ordnung und Orientierung der Elemente im Sehsystem der Fliege. Kybernetik, 7(6), 235-242. doi:10.1007/BF00272661.