@article{MZM_1984_36_1_a8,
     author = {G. M. Ustinov},
     title = {Chebyshev subspaces of spaces of abstract affine functions},
     journal = {Matemati\v{c}eskie zametki},
     pages = {89--101},
     year = {1984},
     volume = {36},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1984_36_1_a8/}
}