1. An. chim;Lapiere;Acta,1947
2. Pam, W. (1924). Boll. chim.farm., 63, 401.
3. Taylor's Principles and Practice of Medical Jurisprudence;Smith, S.;9th Ed,1934
4. Smith, S. (1934b). Ibid., 9th Ed., 2, 666.
5. Turfitt, G. E. (1948). Quart. J. Pharm., 21, 1.