Cite

    Richard Hunter et al.. “Effect of folic acid by mouth on cerebrospinal fluid homovanillic acid and 5-hydroxyindoleacetic acid concentration.” Journal of neurology, neurosurgery and psychiatry, vol. 34, no. 5, 1971, pp. 571–575. http://access.bl.uk/ark:/81055/vdc_100137789438.0x00003e