Electron microscopic study of acetylcholinesterase -activity and vasoactive intestinal peptide and neuro-peptide y-immunoreactivity of the intraepithelial nerve fibers in the nasal gland of the guinea pig - Yokoyama, R; Inokuchi, T; Takahashi, Y; Watanabe, Ii-Sei (Archives of Histology and Cytology, 1991)