1. The Chemistry of Heterocycles;Eicher,2003
2. Heterocyclic Chemistry;Joule,2000
3. Introduction to the Alkaloids;Cordel,1981
4. The Combinatorial Synthesis of Bicyclic Privileged Structures or Privileged Substructures
5. For antipyretic activity of indole derivatives, see: Foye, Williams O. Principles of Medicinal Chemistry, Fourth edition, 1995, pp. 553.