@article{MZM_1990_48_1_a7,
     author = {A. G. Kusraev and S. A. Malyugin},
     title = {Extensions of finitely additive measures},
     journal = {Matemati\v{c}eskie zametki},
     pages = {56--60},
     year = {1990},
     volume = {48},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1990_48_1_a7/}
}