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Gryniewicz, CM; Reepmeyer, JC; Kauffman, JF; Buhse, LF «Detection of undeclared erectile dysfunction drugs and analogues in dietary supplements by ion mobility spectrometry». Journal of pharmaceutical and biomedical analysis, 49, 3, 2009, pàg. 601–6. DOI: 10.1016/j.jpba.2008.12.002. PMID: 19150190.
Choi, Dong Mi; Park, Sangaeh; Yoon, Tae Hyung; Jeong, Hye Kyoung; Pyo, Jae Sung; Park, Janghyun; Kim, Deukjoon; Kwon, Sung Won «Determination of analogs of sildenafil and vardenafil in foods by column liquid chromatography with a photodiode array detector, mass spectrometry, and nuclear magnetic resonance spectrometry». Journal of AOAC International, 91, 3, 2008, pàg. 580–588. PMID: 18567304.
Reepmeyer, John C.; Woodruff, Jeffrey T. «Use of liquid chromatography-mass spectrometry and a chemical cleavage reaction for the structure elucidation of a new sildenafil analogue detected as an adulterant in an herbal dietary supplement». Journal of Pharmaceutical and Biomedical Analysis, 44, 4, 2007, pàg. 887–893. DOI: 10.1016/j.jpba.2007.04.011. PMID: 17532168.
Reepmeyer, John C.; Woodruff, Jeffrey T.; 'Avignon, D. Andre. «Structure elucidation of a novel analogue of sildenafil detected as an adulterant in an herbal dietary supplement». Journal of Pharmaceutical and Biomedical Analysis, 43, 5, 2007, pàg. 1615–1621. DOI: 10.1016/j.jpba.2006.11.037. PMID: 17207601.
Venhuis, B; De Kaste, D «Towards a decade of detecting new analogues of sildenafil, tadalafil and vardenafil in food supplements: A history, analytical aspects and health risks.». J Pharm Biomed Anal., 69, 2012, pàg. 196–208. DOI: 10.1016/j.jpba.2012.02.014. PMID: 22464558.
Venhuis, BJ; Blok-Tip, L; De Kaste, D «Designer drugs in herbal aphrodisiacs». Forensic Science International, 177, 2–3, 2008, pàg. e25–7. DOI: 10.1016/j.forsciint.2007.11.007. PMID: 18178354.
Oh, SS; Zou, P; Low, MY; Koh, HL «Detection of sildenafil analogues in herbal products for erectile dysfunction». Journal of toxicology and environmental health. Part A, 69, 21, 2006, pàg. 1951–8. DOI: 10.1080/15287390600751355. PMID: 16982533.
