Palm, G 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://www.degruyter.com/view/journals/crll/1977/293-294/article-p109.xml (Publisher version)
Besenfelder, H.-J., & Palm, G. (1977). Einige Äquivalenzen zur Riemannschen Vermutung. Journal für die Reine und Angewandte Mathematik, 293-294, 109-115. doi:10.1515/crll.1977.293-294.109.