@article{IVM_1994_5_a4,
     author = {P. G. Ovchinnikov},
     title = {Galois correspondence associated with the extension of charges on the $\sigma$-class of subsets of a~finite set},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {36--40},
     publisher = {mathdoc},
     number = {5},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1994_5_a4/}
}