Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1972_205_3_a8, author = {P. S. Soltan}, title = {Helly{\textquoteright}s theorem for $\mathrm{d}$-convex sets}, journal = {Doklady Akademii Nauk}, pages = {537--539}, publisher = {mathdoc}, volume = {205}, number = {3}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1972_205_3_a8/} }
P. S. Soltan. Helly’s theorem for $\mathrm{d}$-convex sets. Doklady Akademii Nauk, Tome 205 (1972) no. 3, pp. 537-539. http://geodesic.mathdoc.fr/item/DAN_1972_205_3_a8/