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@article{MZM_1999_66_6_a16, author = {I. V. Protasov}, title = {Equations in $\beta G$ and the decomposability of abelian groups}, journal = {Matemati\v{c}eskie zametki}, pages = {951--953}, publisher = {mathdoc}, volume = {66}, number = {6}, year = {1999}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1999_66_6_a16/} }
I. V. Protasov. Equations in $\beta G$ and the decomposability of abelian groups. Matematičeskie zametki, Tome 66 (1999) no. 6, pp. 951-953. http://geodesic.mathdoc.fr/item/MZM_1999_66_6_a16/