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2. United States Pharmacopoeia, 19th Edition, 1975, pp. 211–212.
3. M.E. Brown, Introduction to Thermal Analysis, Techniques and Applications, Chapman & Hall, London, 1988, pp. 58–67.
4. A. Vora, Thermal stability of folic acid and associated excipients, M.Sc. thesis, The University of Toledo, December 2001.
5. C.J. Keattch, D. Dollimore, An Introduction to Thermogravimetry, 2nd Edition, Heyden, London, 1975, pp. 28–35.