@article{DAN_1973_212_3_a6,
     author = {B. S. Mityagin and E. M. Nikishin},
     title = {The divergence of spectral decompositions in the mean and almost everywhere},
     journal = {Doklady Akademii Nauk},
     pages = {551--552},
     publisher = {mathdoc},
     volume = {212},
     number = {3},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_212_3_a6/}
}