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4. Yu. I. Malov, V. A. Korol’kov, and A. A. Markov, Electron Work Function of Binary Alloys, Available from VINITI (Moscow, 1978).
5. B. B. Alchagirov, Kh. Kh. Kalazhokov, Kh. B. Khokonov, Poverkhnost: Fiz. Khim. Mekh., No. 7, 49 (1982).