A. PAREKH, S.; PUDAGE, A.; S. JOSHI, S.; V. VAIDYA, V. Simultaneous Determination of Simvastatin, Simvastatin Acid, Ramipril and Ramiprilate in Human Plasma by Liquid Chromatography-Tandem Mass Spectrometry. ajc 2010, 21, 3467-3479.