1. O. Le Roy Salerni, Natural and Synthetic Organic Medicinal Compounds, C.V. Mosby, St. Louis, MO, 1976, pp. 166–224.
2. EU note for guidance: Investigation of bioavailability and bioequivalence. CPMP working party on efficacy of medicinal product. III/54/89-EN-FINAL, December 1991.
3. US Pharmacopoeia XXIII Suppl. 5 (1996) 3490.
4. High-performance liquid chromatography of antibiotics