1. , , , , , , , , in: Aromaticity, Special Publication No. 21, Chemical Society, London 1967, S. 75;
2. [18]ANNULENE
3. : Aromaticity, Wiley, New York 1986
4. in: Aromaticity, Special Publication No. 21, Chemical Society, London 1967, S. 113;
5. 1,6-METHANO[10]ANNULENE