TY - JOUR AU - A. G. El'kin TI - On the construction of $\rho$-maximal spaces using expansions relative to centered $\rho$-systems JO - Doklady Akademii Nauk PY - 1973 SP - 793 EP - 795 VL - 212 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1973_212_4_a2/ LA - ru ID - DAN_1973_212_4_a2 ER -