@article{DM_1995_7_3_a7,
     author = {V. A. Yudin},
     title = {Coverings of a sphere, and extremal properties of orthogonal polynomials},
     journal = {Diskretnaya Matematika},
     pages = {81--88},
     publisher = {mathdoc},
     volume = {7},
     number = {3},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1995_7_3_a7/}
}