@article{RM_1994_49_1_a9,
     author = {Yu. A. Farkov},
     title = {Widths and cowidths of {Hardy} spaces},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {231--232},
     publisher = {mathdoc},
     volume = {49},
     number = {1},
     year = {1994},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1994_49_1_a9/}
}