Olsson, C. & Karila, P. (1995)
Coexistence of NADPH-diaphorase and vasoactive intestinal polypeptide in the enteric nervous system of the Atlantic cod (Gadus morhua) and the spiny dogfish (Squalus acanthias).
Cell and Tissue Research, 280(2), 297–305 DOI: 10.1007/s004410050357