1. in Progress in Medicinal Chemistry, p. 86, Ed. and , North-Holland Publishing Comp., New York 1974.
2. in Medicinal Chemistry, Vol. I, p. 448, by Wiley-Interscience Publishing Comp., New York 1970.
3. Studies on 2-Benzimidazolethiol Derivatives. II
4. in Ref. 2, p. 323.