Impurity fingerprints for the identification of counterfeit medicines--a feasibility study., Sacré, Pierre-Yves, Deconinck Eric, Daszykowski Michal, Courselle Patricia, Vancauwenberghe Roy, Chiap Patrice, Crommen Jacques, and De Beer Jacques O. , Anal Chim Acta, 2011 Sep 09, Volume 701, Issue 2, p.224-31, (2011)