1. The effect of atropine, alpha and beta blockers on human penile erection: a controlled pilot study;Wagner,1980
2. E. Willis, B. Ottesen, G. Wagner, F. Sundler, J. Fahrenkrug, Vasoactive intestinal polypeptide (VIP) as a putative neurotransmitter in penile erection (Unpublished).
3. VIPergic nerves in the penis;Polak;Lancet,1981
4. Intracavernous injection of papaverine for erectile failure;Virag;Lancet,1982
5. Radioimmunoassay of vasoactive intestinal polypeptide (VIP) in plasma;Fahrenkrug;J Lab Clin Med,1977