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@article{MS_1963__103_2_a6, author = {{\CYRL}.{\CYRN}. {\CYRSH}{\cyre}{\cyrv}{\cyrr}{\cyri}{\cyrn}}, title = {{\CYRO} {\cyrp}{\cyro}{\cyrl}{\cyru}{\cyrg}{\cyrr}{\cyru}{\cyrp}{\cyrp}{\cyra}{\cyrh}, {\cyrv}{\cyrs}{\cyre} {\cyrp}{\cyro}{\cyrd}{\cyrp}{\cyro}{\cyrl}{\cyru}{\cyrg}{\cyrr}{\cyru}{\cyrp}{\cyrp}{\cyrery} {\cyrk}{\cyro}{\cyrt}{\cyro}{\cyrr}{\cyrery}{\cyrh} {\cyrd}{\cyro}{\cyrs}{\cyrt}{\cyri}{\cyrzh}{\cyri}{\cyrm}{\cyrery}}, journal = {Matemati\v{c}eskij sbornik}, pages = {253--256}, publisher = {mathdoc}, volume = {103}, number = {2}, year = {1963}, zbl = {0124.01703}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MS_1963__103_2_a6/} }
Л.Н. Шеврин. О полугруппах, все подполугруппы которых достижимы. Matematičeskij sbornik, Tome 103 (1963) no. 2, pp. 253-256. http://geodesic.mathdoc.fr/item/MS_1963__103_2_a6/