@article{10_4153_CJM_1994_033_1,
     author = {Leviatan, D. and Lubinsky, D. S.},
     title = {Degree of {Approximation} by {Rational} {Functions} with {Prescribed} {Numerator} {Degree}},
     journal = {Canadian journal of mathematics},
     pages = {619--633},
     year = {1994},
     volume = {46},
     number = {3},
     doi = {10.4153/CJM-1994-033-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1994-033-1/}
}