@article{SM_1988_61_1_a5,
     author = {A. A. Pekarskii},
     title = {Tchebycheff rational approximation in the disk, on the circle, and on a closed interval},
     journal = {Sbornik. Mathematics},
     pages = {87--102},
     publisher = {mathdoc},
     volume = {61},
     number = {1},
     year = {1988},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1988_61_1_a5/}
}