@article{MZM_1986_39_5_a6,
     author = {G. A. Fomin},
     title = {A property of orthogonal series in {Jacobi} polynomials},
     journal = {Matemati\v{c}eskie zametki},
     pages = {684--690},
     year = {1986},
     volume = {39},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1986_39_5_a6/}
}