@article{MZM_1983_34_4_a7,
     author = {A. L. Garkavi},
     title = {Estimating the norm of a conditional extension of a linear functional},
     journal = {Matemati\v{c}eskie zametki},
     pages = {559--572},
     publisher = {mathdoc},
     volume = {34},
     number = {4},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1983_34_4_a7/}
}