"Vardenafil". Medicine Net. 7 Ekim 2017 tarihinde kaynağından arşivlendi. Erişim tarihi: 18 Şubat 2014.
medscape.com
Schools of Pharmacy (Glen L. Stimmel, Pharm.D., and Mary A. Gutierrez, Pharm.D.) and Medicine (Glen L. Stimmel, Pharm.D.), University of Southern California, Los Angeles, California. "Counseling Patients About Sexual Issues: Drug-Induced Priapism". Medscape. 11 Mayıs 2015 tarihinde kaynağından arşivlendi. Erişim tarihi: 6 Aralık 2010.KB1 bakım: Birden fazla ad: yazar listesi (link)
Lepor, Herbert; Lepor, Norman E; Hill, Lawrence A; Trohman, Richard G (2008). "The QT Interval and Selection of Alpha-Blockers for Benign Prostatic Hyperplasia". Reviews in Urology. 10 (2). ss. 85-91. ISSN1523-6161. PMC2483321 $2. PMID18660858.
Schools of Pharmacy (Glen L. Stimmel, Pharm.D., and Mary A. Gutierrez, Pharm.D.) and Medicine (Glen L. Stimmel, Pharm.D.), University of Southern California, Los Angeles, California. "Counseling Patients About Sexual Issues: Drug-Induced Priapism". Medscape. 11 Mayıs 2015 tarihinde kaynağından arşivlendi. Erişim tarihi: 6 Aralık 2010.KB1 bakım: Birden fazla ad: yazar listesi (link)
Lepor, Herbert; Lepor, Norman E; Hill, Lawrence A; Trohman, Richard G (2008). "The QT Interval and Selection of Alpha-Blockers for Benign Prostatic Hyperplasia". Reviews in Urology. 10 (2). ss. 85-91. ISSN1523-6161. PMC2483321 $2. PMID18660858.