Innervation of the rat pineal gland by nerve fibres originating in the sphenopalatine, otic and trigeminal ganglia. A retrograde in vivo neuronal tracing study Morten Møller and Wei LiuReprod. Nutr. Dev., 39 3 (1999) 345-353DOI: https://doi.org/10.1051/rnd:19990307