@article{DAN_1993_329_5_a6,
     author = {U. Raitums},
     title = {The maximum principle and the passage to convex hulls in optimal},
     journal = {Doklady Akademii Nauk},
     pages = {553--555},
     publisher = {mathdoc},
     volume = {329},
     number = {5},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1993_329_5_a6/}
}