MathSciNet bibliographic data MR1301691 81P10 (28C05) Ovchinnikov, P. G. Galois correspondence associated with the extension of charges on the $\sigma$$\sigma$-class of subsets of a finite set. (Russian) Izv. Vyssh. Uchebn. Zaved. Mat. 1994, no. 5, 36--40; translation in Russian Math. (Iz. VUZ) 38 (1994), no. 5, 34–38 Links to the journal or article are not yet available

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