Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{CMUC_1977__18_1_a1, author = {Be\v{c}v\'a\v{r}, Jind\v{r}ich}, title = {$K$-essential subgroups of abelian groups. {III.}}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {11--18}, publisher = {mathdoc}, volume = {18}, number = {1}, year = {1977}, mrnumber = {0439953}, zbl = {0359.20036}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1977__18_1_a1/} }
Bečvář, Jindřich. $K$-essential subgroups of abelian groups. III.. Commentationes Mathematicae Universitatis Carolinae, Tome 18 (1977) no. 1, pp. 11-18. http://geodesic.mathdoc.fr/item/CMUC_1977__18_1_a1/