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