Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{CMUC_1976__17_3_a5, author = {Be\v{c}v\'a\v{r}, Jind\v{r}ich}, title = {$K$-essential subgroups of abelian groups. {I}}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {481--492}, publisher = {mathdoc}, volume = {17}, number = {3}, year = {1976}, mrnumber = {0439951}, zbl = {0344.20042}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1976__17_3_a5/} }
Bečvář, Jindřich. $K$-essential subgroups of abelian groups. I. Commentationes Mathematicae Universitatis Carolinae, Tome 17 (1976) no. 3, pp. 481-492. http://geodesic.mathdoc.fr/item/CMUC_1976__17_3_a5/