1. O. G. Vendik, Antennas with Non-Mechanical Scanning (Sovetskoe Radio, Moscow, 1965) [in Russian].
2. S. P. Skobelev, Phased Arrays with Flat-Topped Patterns (Fizmatlit, Moscow, 2010) [in Russian].
3. J. P. Shelton, IEEE Trans. Antennas Propag. 13, 992 (1965).
4. R. J. Mailloux and P. R. Franchi, US Patent, No. 3938160 (10 Feb. 1976).
5. R. F. Frazita, A. R. Lopez, and R. J. Giannini, US Patent, No. 4041501 (9 Aug. 1977).