TY - JOUR AU - P. G. Ovchinnikov TI - Galois correspondence associated with the extension of charges on the $\sigma$-class of subsets of a~finite set JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1994 SP - 36 EP - 40 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1994_5_a4/ LA - ru ID - IVM_1994_5_a4 ER -