1. W. C. Cutting, Handbook of Pharmacology, 3rd ed., Meredith Company, New York 1967.
2. A. N. Cost and I. I. Gradbery, Progress in Pyrazole Chemistry, Advances in Heterocyclic Chemistry, (Edited by A. R. Katritzky and A. J. Boulton), Vol. 6, Academic Press, New York 1966, p.348.
3. K. Ueda, N. Kobayashi and Y. Yamamoto, Analyst, 111 (1986) 733.
4. V. M. Ivanov, O. M. Vilkova and A. I. Busev, Zh. Anal. Khim., 33 (1978) 716; C.A. 89 (1978) 99082a.
5. J. Ciba and M. Langova, Colin. Czech. Chem. Commun., 38 (1973) 3405.