Steffen, H 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;
Steffen, H. (1975). Quantitative Untersuchungen der Axon-Kollateralen der Pyramidenzellen in der Großhirnrinde der Maus. Diploma Thesis, Eberhard-Karls-Universität, Tübingen, Germany.