@article{MZM_1974_15_1_a4,
     author = {V. S. Boichuk and A. A. Gol'dberg},
     title = {The three-lines theorem},
     journal = {Matemati\v{c}eskie zametki},
     pages = {45--53},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1974_15_1_a4/}
}