1. Hetero Diels–Alder Methodology in Organic Synthesis;Boger,1987
2. Pyrroles and their Benzo Derivatives: Reactivity;Jones,1984
3. Pyrroles and their Benzo Derivatives: Reactivity;Black,1996
4. Pyrroles and their Benzo Derivatives: Synthesis;Sundberg,1996
5. 1,2,4,5-Tetrazines;Sauer,1996