1. S.E. Harris, S.T.K. Nieh, and D.K. Wilson, Electronically Tunable Acousto-Optic Filter, Appl. Phys. Lett., 15: 325, (1969).
2. I.C. Chang, Tunable Acousto-Optic Filters. An overview, SPIE 90, Acousto-Optics, 12, (1976).
3. P. Katzka and I.C. Chang, Noncollinear Acousto-Optic Filter for the Ultraviolet, SPIE 202, Active Optical Devices, 26, (1979).
4. V.B. Voloshinov, I.V. Nickolayev, and V.N. Parygin, Collinear Acousto-Optical Filtration in Quartz Crystal, Sov. Moscow Univ. Bulletin, Phys. and Astron., 21: 42, (1980).
5. V.B. Voloshinov, Tunable Photometer on a Base of an Acousto-Optical Filter, Proc. 4-th Ail-Union Conf. Photometry and Metrology Maintenance, USSR, Moscow. 137, (in Russian) (1982).