1. Craigie EH (1955) Vascular patterns of the developing nervous system. In: Waeksch H (ed) Biochemistry of the developing nervous system, Academic Press, New York, p. 28–51
2. Di Chiro G., Harrington T., Fried LC (1973) Microangiography of human fetal spinal cord. Am J Roentgenol 118:193–199
3. Hoskius ER (1914) On the vascularisation of the spinal cord of the pig. Anat REc 8:371–391
4. Stoeter P, Schmidt-Lademann S., Voigt K (1980) Embryonal and fetal development of capillaries: microangiographic investigatoins. I. The brain stem. Diagnostic Imaging 49:131–140
5. Thron AK (1988) Vascular anatomy of the spinal cord. Neuroradiological investigations and clinical syndromes. Springer, Wien — New York