1. A. W. Lutskii, ?Intramolecular charge-transfer bands in the vibronic spectra of substituted benzene,? Opt. Spektrosk., 304, No. 6, 1076?1081 (1973).
2. J. N. Murrell, ?The electronic spectrum of aromatic molecules. VI. The mesomeric effect,? Proc. Phys. Soc. (London), 68A, 969?975 (1955).
3. V. N. Mochalkin, ?Determination of p band energy and intensity of complex conjugated systems by the fragment method in the one-electron approximation,? Teor. Eksp. Khim., 9, No. 3, 357?361 (1973).
4. J. Fabian and G. Tröger-Naake, ?MO-LCAO calculations on polymethines. V. PPP-type calculations and configuration analyses of simple prototype dyes,? Int. J. Quantum Chem., 11, No. 2, 259?269 (1977).
5. A. V. Luzanov, ?Localization and transfer of charge during electronic excitation of molecules,? Teor. Eksp. Khim., 13, No. 5, 579?588 (1977).