1. M. E. Wolff , ‘Burger's Medicinal Chemistry,’Wiley, New York, 1977, Part II, p. 873;
2. M. E. Wolff , ‘Burger's Medicinal Chemistry,’Wiley, New York, 1977, Part II, p. 637.
3. T. Nogrady , ‘Medicinal Chemistry, A Biochemical Approach,’Oxford University Press, Oxford, 1985, p. 206.