Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MS_1946__60_3_a6, author = {{\CYRE}.{\CYRA}. {\CYRB}{\cyra}{\cyrr}{\cyrb}{\cyra}{\cyrsh}{\cyri}{\cyrn}}, title = {{\CYRO} $\ensuremath{\sigma}$- {\cyrp}{\cyro}{\cyrk}{\cyrr}{\cyrery}{\cyrt}{\cyri}{\cyrya}{\cyrh} {\cyrp}{\cyrr}{\cyro}{\cyrs}{\cyrt}{\cyrr}{\cyra}{\cyrn}{\cyrs}{\cyrt}{\cyrv}{\cyra}}, journal = {Matemati\v{c}eskij sbornik}, pages = {423--428}, publisher = {mathdoc}, volume = {60}, number = {3}, year = {1946}, zbl = {0061.40006}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MS_1946__60_3_a6/} }
Е.А. Барбашин. О $σ$- покрытиях пространства. Matematičeskij sbornik, Tome 60 (1946) no. 3, pp. 423-428. http://geodesic.mathdoc.fr/item/MS_1946__60_3_a6/