1. House HO (1972) Modern synthetic reaction. The Benjamin Cummings Publishing Company, Menlo Park, California p 353
2. Pesez M, Bartos J (1974) Colorimetric and fluorimetric analysis of organic compounds and drugs. Marcel Dekker, Inc., New York, a p 540, b p 504
3. Görög S, Szász Gy (1978) Analysis of steroid hormone drugs. Akadémiai Kiadó, Budapest, p 345
4. Mason HL, Hoehn WM, McKenzie BF, Kendall EC (1937) J Biol Chem 120:719
5. Higuchi T, Brochmann-Hanssenm E (1961) Pharmaceutical analysis. Interscience Publishers, New York, London, p 77