Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_1959__9_4_a2, author = {Neubrunn, Tibor and \v{S}al\'at, Tibor}, title = {O mno\v{z}in\'ach vzdialenost{\'\i} mno\v{z}{\'\i}n metrick\'eho priestoru}, journal = {Mathematica slovaca}, pages = {222--235}, publisher = {mathdoc}, volume = {09}, number = {4}, year = {1959}, mrnumber = {0130672}, zbl = {0091.36104}, language = {sl}, url = {http://geodesic.mathdoc.fr/item/MASLO_1959__9_4_a2/} }
Neubrunn, Tibor; Šalát, Tibor. O množinách vzdialeností množín metrického priestoru. Mathematica slovaca, Tome 09 (1959) no. 4, pp. 222-235. http://geodesic.mathdoc.fr/item/MASLO_1959__9_4_a2/