@article{DAN_1973_208_1_a2,
     author = {A. A. Borovkov and E. A. Pechersky},
     title = {Criteria for weak convergence of nonnegative measures, and $\sigma$-topological spaces},
     journal = {Doklady Akademii Nauk},
     pages = {18--20},
     publisher = {mathdoc},
     volume = {208},
     number = {1},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_208_1_a2/}
}