Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1967_2_2_a9, author = {L. P. Vlasov}, title = {Chebyshev sets and approximately convex sets}, journal = {Matemati\v{c}eskie zametki}, pages = {191--200}, publisher = {mathdoc}, volume = {2}, number = {2}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1967_2_2_a9/} }
L. P. Vlasov. Chebyshev sets and approximately convex sets. Matematičeskie zametki, Tome 2 (1967) no. 2, pp. 191-200. http://geodesic.mathdoc.fr/item/MZM_1967_2_2_a9/