Botti, M., Gazza, F., Ragionieri, L., Bo Minelli, L., & Panu, R. (2013). Double labelling immunohistochemistry on the sympathetic trunk ganglia neurons projecting to the extrinsic penile smooth musculature of the pig: an experimental study on the retractor penis muscle. Italian Journal of Anatomy and Embryology, 118(2), 223–239. Retrieved from https://oajournals.fupress.net/index.php/ijae/article/view/1195