1. F. Marschner and H. A. Goetz, ?Korrelation zwischen Photoelektronen und Elektronen-Spektren,? Tetrahedron,30, No. 7, 3159?3163 (1974).
2. L.-M. Z. Balyavichyus, V. A. Urba, L. N. Kidalova, et al., ?Investigation of the influence of the structure and position of the substituent on the nature of electronic bands of derivatives of 1,4-benzodioxan,? Lit. Fiz. Sb.,15, No. 5, 763?770 (1975).
3. R. L. Ellis, G. Kuehnlenz, and H. H. Jaffe, ?The use of CNDO method in spectroscopy,? Theor. Chim. Acta,26, No. 2, 131?140 (1972).
4. L. Zuelicke, Quantenchemie, Deut. Verlag Wissenschaften, Berlin (1973).
5. O. V. Sverdlova, Electronic Spectra in Organic Chemistry [in Russian], Khimiya, Leningrad (1973).