@article{DAN_1973_212_4_a2,
     author = {A. G. El'kin},
     title = {On the construction of $\rho$-maximal spaces using expansions relative to centered $\rho$-systems},
     journal = {Doklady Akademii Nauk},
     pages = {793--795},
     publisher = {mathdoc},
     volume = {212},
     number = {4},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_212_4_a2/}
}