Cell Tissue Res. 1977 Jun 13;180(4):537-53. doi: 10.1007/BF00220174.
Morphological examination of the metabolism in the secretory cells of the nervous system. I. Autoradiographic study of the incorporation of 35S-labelled cysteine and methionine into the neurosecretory system of the earthworm (eisenia foetida, lumbricus herculeus).