@article{MS2_1964__15_165896,
     author = {Q.I. Rahman},
     title = {Extremal {Properties} of the {Successive} {Derivatives} of {Polynomials} and {Rational} {Functions.}},
     journal = {Mathematica Scandinavica},
     pages = {121--130},
     publisher = {mathdoc},
     volume = {15},
     year = {1964},
     zbl = {0154.06903},
     url = {http://geodesic.mathdoc.fr/item/MS2_1964__15_165896/}
}