1. The motor nuclei and roots of the cranial and first spinal nerves of vertebrates
2. Studies on the spinal cord and medulla of cyclostomes with special refernce to the formation and expansion of the roof plate and the flattening of the spinal cord
3. 1910 Weitere Mitteilungen über Neurobiotaxis. V. The migrations of the motor cells of the bulbar trigeminus, abducens and facialis in the series of vertebrates and differences in the course of their root-fibers. Verh. kon. Acad. Wet., Amsterdam, 16: 1-195.