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3. H. R. Kruyt, Colloid Science: Irreversible Systems (Elsevier, Amsterdam, 1949).
4. V. V. Vojtylov, M. P. Petrov, A. A. Spartakov, and A. A. Trusov, Opt. Spectrosc. 114, 630 (2013).
5. M. F. Vuks, Electrical and Optical Properties of Molecules and Condensed Matter (Leningr. Univ., Leningrad, 1984) [in Russian].