Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{AUCMP_1995__36_1_a2, author = {Beran, Ladislav}, title = {On midpoints in lattices}, journal = {Acta Universitatis Carolinae. Mathematica et Physica}, pages = {9--15}, publisher = {mathdoc}, volume = {36}, number = {1}, year = {1995}, mrnumber = {1366504}, zbl = {0821.06005}, language = {en}, url = {http://geodesic.mathdoc.fr/item/AUCMP_1995__36_1_a2/} }
Beran, Ladislav. On midpoints in lattices. Acta Universitatis Carolinae. Mathematica et Physica, Tome 36 (1995) no. 1, pp. 9-15. http://geodesic.mathdoc.fr/item/AUCMP_1995__36_1_a2/