FAGG/AFMPS, Belgian participation in PANGEA III, an international operation fighting against the online sale of counterfeit and illegal medicines, October 2010, http://www.fagg-afmps.be/fr/news/news_pangea_III.jsp.
US FDA, Label and Approval History: Viagra®, (last accessed 09.05.11). http://www.accessdata.fda.gov/scripts/cder/drugsatfda/index.cfm?fuseaction=Search.DrugDetails.
EMA, Authorisation Details: Viagra®, (last accessed 09.05.11). http://www.ema.europa.eu/ema/index.jsp%3Fcurl=pages/medicines/human/medicines/000202/human_med_001136.jsp%26mid=WC0b01ac058001d124%26murl=menus/medicines/medicines.jsp%26jsenabled=true.
Rodomonte A.L., Gaudiano M.C., Antoniella E., Lucente D., Crusco V., Bartolomei M., Bertocchi P., Manna L., Valvo L., Muleri N. Counterfeit drugs detection by measurement of tablets and secondary packaging colour. J. Pharm. Biomed. Anal. 2010, 53:215-220.
Vredenbregt M.J., Blok-Tip L., Hoogerbrugge R., Barends D.M., de Kaste D. Screening suspected counterfeit Viagra ® and imitations of Viagra ® with near-infrared spectroscopy. J. Pharm. Biomed. Anal. 2010, 40:840-849.
de Veij M., Deneckere A., Vandenabeele P., de Kaste D., Moens L. Detection of counterfeit Viagra ® with Raman spectroscopy. J. Pharm. Biomed. Anal. 2008, 46:303-309.
Sacré P.-Y., Deconinck E., De Beer T., Courselle P., Vancauwenberghe R., Chiap P., Crommen J., De Beer J.O. Comparison and combination of spectroscopic techniques for the detection of counterfeit medicines. J. Pharm. Biomed. Anal. 2010, 53:445-453.
Maurin J.K., Pluciński F., Mazurek A.P., Fijałek Z. The usefulness of simple X-ray powder diffraction analysis for counterfeit control-the Viagra ® example. J. Pharm. Biomed. Anal. 2007, 43:1514-1518.
Wawer I., Pisklak M., Chilmonczyk Z. 1H 13C, 15N NMR analysis of sildenafil base and citrate (Viagra) in solution, solid state and pharmaceutical dosage forms. J. Pharm. Biomed. Anal. 2005, 38:865-870.
Trefi S., Gilard V., Balayssac S., Malet-Martino M., Martino R. The usefulness of 2D DOSY and 3D DOSY-COSY 1H NMR for mixture analysis: application to genuine and fake formulations of sildenafil (Viagra). Magn. Reson. Chem. 2009, 47:163-173.
Nawaz H., Bonnier F., Knief P., Howe O., Lyng F.M., Meade A.D., Byrne H.J. Evaluation of the potential of Raman microspectroscopy for prediction of chemotherapeutic response to cisplatin in lung adenocarcinoma. Analyst 2010, 135:3070-3076.
Juillard A., Falgayrac G., Cortet B., Vieillard M.H., Azaroual N., Hornez J.C., Penel G. Molecular interactions between zoledronic acid and bone: an in vitro Raman microspectroscopic study. Bone 2010, 47:895-904.
Quinten T., De Beer T., Vervaet C., Remon J.P. Evaluation of injection moulding as a pharmaceutical technology to produce matrix tablets. Eur. J. Pharm. Biopharm. 2009, 71:145-154.
Furuyama N., Hasegawa S., Hamaura T., Yada S., Nakagami H., Yonemochi E., Terada K. Evaluation of solid dispersions on a molecular level by the Raman mapping technique. Int. J. Pharm. 2008, 361:12-18.
Karavas E., Georgarakis M., Docoslis A., Bikiaris D. Combining SEM, TEM, and micro-Raman techniques to differentiate between the amorphous molecular level dispersions and nanodispersions of a poorly water-soluble drug within a polymer matrix. Int. J. Pharm. 2007, 340:76-83.
Vajna B., Farkas I., Szabó A., Zsigmond Z., Marosi G. Raman microscopic evaluation of technology dependent structural differences in tablets containing imipramine model drug. J. Pharm. Biomed. Anal. 2010, 51:30-38.
Burger J., Geladi P. Hyperspectral NIR imaging for calibration and prediction: a comparison between image and spectrometer data for studying organic and biological samples. Analyst 2006, 131:1152-1160.
Roggo Y., Edmond A., Chalus P., Ulmschneider M. Infrared hyperspectral imaging for qualitative analysis of pharmaceutical solid forms. Anal. Chim. Acta 2005, 535:79-87.
Roggo Y., Jent N., Edmond A., Chalus P., Ulmschneider M. Characterizing process effects on pharmaceutical solid forms using near-infrared spectroscopy and infrared imaging. Eur. J. Pharm. Biopharm. 2005, 61:100-110.
El-Hagrasy A.S., Morris H.R., D'Amico F., Lodder R.A., Drennen J.K. Near-infrared spectroscopy and imaging for the monitoring of powder blend homogeneity. J. Pharm. Sci. 2001, 90:1298-1307.
Lopes M.B., Wolff J.C. Investigation into classification/sourcing of suspect counterfeit Heptodintrade mark tablets by near infrared chemical imaging. Anal. Chim. Acta 2009, 633:149-155.
Lopes M.B., Wolff J.C., Bioucas-Dias J.M., Figueiredo M.A. Determination of the composition of counterfeit Heptodin tablets by near infrared chemical imaging and classical least squares estimation. Anal. Chim. Acta 2009, 641:46-51.
Puchert T., Lochmann D., Menezes J.C., Reich G. Near-infrared chemical imaging (NIR-CI) for counterfeit drug identification-a four-stage concept with a novel approach of data processing (Linear Image Signature). J. Pharm. Biomed. Anal. 2010, 51:138-145.
Massart D.L., Vandeginste B.G.M., Buydens L.M.C., De Jong S., Lewi P.J., Smeyers-verbeke J. Handbook of Chemometrics and Qualimetrics-Part A 1997, Elsevier Science, Amsterdam.
Kennard R.W., Stone L.A. Computer aided design of experiments. Technometrics 1969, 11:137-148.
Massart D.L., Vandeginste B.G.M., Buydens L.M.C., De Jong S., Lewi P.J., Smeyers-verbeke J. Handbook of Chemometrics and Qualimetrics-Part B 1997, Elsevier Science, Amsterdam.
Wu W., Mallet Y., Walczak B., Penninckx W., Massart D.L., Heuerding S., Erni F. Comparison of regularized discriminant analysis linear discriminant analysis and quadratic discriminant analysis, applied to NIR data. Anal. Chim. Acta 1996, 329:257-265.
De Gelder J., De Gussem K., Vandenabeele P., Moens L. Reference database of Raman spectra of biological molecules. J. Raman Spectrosc. 2007, 38:1133-1147.
Balss K.M., Llanos G., Papandreou G., Maryanoff C.A. Quantitative spatial distribution of sirolimus and polymers in drug-eluting stents using confocal Raman microscopy. J. Biomed. Mater. Res. A 2008, 85:258-270.