@article{SM_1989_62_2_a1,
     author = {A. A. Gonchar and E. A. Rakhmanov},
     title = {Equilibrium distributions and degree of rational approximation of
},
     journal = {Sbornik. Mathematics},
     pages = {305--348},
     publisher = {mathdoc},
     volume = {62},
     number = {2},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1989_62_2_a1/}
}