@article{SM_1995_186_6_a0,
     author = {V. M. Badkov},
     title = {Pointwise estimates from below of the~moduli of the~derivatives of orthogonal polynomials on of the~derivatives of orthogonal polynomials~on},
     journal = {Sbornik. Mathematics},
     pages = {771--781},
     publisher = {mathdoc},
     volume = {186},
     number = {6},
     year = {1995},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1995_186_6_a0/}
}