@article{MZM_1972_11_5_a2,
     author = {K. N. Lungu},
     title = {Best approximations by rational functions with respect to the {Hausdorff} distance},
     journal = {Matemati\v{c}eskie zametki},
     pages = {491--498},
     publisher = {mathdoc},
     volume = {11},
     number = {5},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1972_11_5_a2/}
}