@article{RM_1974_29_3_a5,
     author = {R. S. Ismagilov},
     title = {Diameters of sets in normed linear spaces and the approximation of functions by trigonometric polynomials},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {169--186},
     publisher = {mathdoc},
     volume = {29},
     number = {3},
     year = {1974},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1974_29_3_a5/}
}