@article{700830,
     title = {Ob odnom svoistve nul'mernykh metricheskkh rostranstv},
     booktitle = {General Topology and its Relations to Modern Analysis and Algebra},
     series = {GDML\_Books},
     publisher = {Academia Publishing House of the Czechoslovak Academy of Sciences},
     address = {Praha},
     year = {1967},
     pages = {241-242},
     zbl = {0191.53401},
     url = {http://dml.mathdoc.fr/item/700830}
}

Levshenko, B.; Smirnov, J. M. Об одном свойстве нульмерных метрическх ространств, dans General Topology and its Relations to Modern Analysis and Algebra, GDML_Books,  (1967), pp. 241-242. http://gdmltest.u-ga.fr/item/700830/