@article{MS2_1967__20_165976,
     author = {Christian H\"orup},
     title = {An {Asymptotic} {Formula} for the {Derivatives} of {Orthogonal} {Polynomials} of the {Unit} {Circle.}},
     journal = {Mathematica Scandinavica},
     pages = {32--40},
     publisher = {mathdoc},
     volume = {20},
     year = {1967},
     zbl = {0181.34902},
     url = {http://geodesic.mathdoc.fr/item/MS2_1967__20_165976/}
}