Yasui K, Hashizume Y, Yoshida M, Kameyama T, Sobue G (1999). “Age-related morphologic changes of the central canal of the human spinal cord”. Acta Neuropathol.97 (3): 253–9. doi:10.1007/s004010050982. PMID10090672.
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pubmed.ncbi.nlm.nih.gov
Yasui K, Hashizume Y, Yoshida M, Kameyama T, Sobue G (1999). “Age-related morphologic changes of the central canal of the human spinal cord”. Acta Neuropathol.97 (3): 253–9. doi:10.1007/s004010050982. PMID10090672.