@article{AA_2010_22_5_a4,
     author = {N. O. Kotelina and A. B. Pevnyǐ},
     title = {Extremal properties of spherical semidesigns},
     journal = {Algebra i analiz},
     pages = {131--139},
     publisher = {mathdoc},
     volume = {22},
     number = {5},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2010_22_5_a4/}
}