1. Randic M., Benjamin M., Trinajstic N. (1986) On the aromatic stabilities of polyacenes and helicenes croatia. Chem. Acta 59(2): 345
2. Clar E. (1964). Polycyclic Hydrocarbons. Academic Press, London
3. Martin R.H. (1974) Angew. Chem. Int. Edit. English 13: 649
4. Clar E., Robertson J.M., Schlogel R., Schmidt W. (1981) J. Amer. Chem. Soc. 103: 1320
5. Lee M.L., Novotny M.V., Bartle K.D. (1981). Analytical Chemistry of Polycyclic Aromatic Hydrocarbons. Academic, New York