Przypisy
- ↑ Galiè, N, Ghofrani, HA, Torbicki, A, Barst, RJ, Rubin, LJ, Badesch, D, Fleming, T, Parpia, T, Burgess, G, Branzi, A, Grimminger, F, Kurzyna, M, Simonneau, G. Sildenafil citrate therapy for pulmonary arterial hypertension. N Engl J Med. 353, 20, 2148-2157. 2005. PMID 16291984.
- ↑ Basson, R, McInnes, R, Smith, MD, Hodgson, G, Koppiker, N. Efficacy and safety of sildenafil citrate in women with sexual dysfunction associated with female sexual arousal disorder. J Womens Health Gend Based Med, 11, 367-377. 2002. PMID 12150499.
- ↑ Goldstein, I, Lue, TF, Padma-Nathan, H, Rosen, RC, Steers, WD, Wicker, PA. Oral Sildenafil in the Treatment of Erectile Dysfunction. N Engl J Med. 338, 20, 1397-1404. 1998. PMID 9580646.
- ↑ Peterson K. Young men add Viagra owo their drug arsenal, USAToday, 2001-03-21.
- ↑ Siegel-Itzkovich J. Viagra makes flowers stand up straight. Student BMJ. 1999. PMID 10639884.
- ↑ Dunn PJ. Synthesis of Commercial Phosphodiesterase(V) Inhibitors. Org Process Res Dev, 88-97. 2005. S1083-6160(04)00019-2 doi:10,1021/op040019c S1083-6160(04)00019-2.