@article{MZM_1990_48_4_a2,
     author = {A. L. Garkavi and V. A. Kaminskii},
     title = {Certain extremal problem in a~measure space},
     journal = {Matemati\v{c}eskie zametki},
     pages = {19--28},
     publisher = {mathdoc},
     volume = {48},
     number = {4},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1990_48_4_a2/}
}