@article{MZM_1977_21_1_a5,
     author = {V. N. Spevakov and A. B. Kudryavtsev},
     title = {Absolute summability of orthogonal series by {Euler{\textquoteright}s} method},
     journal = {Matemati\v{c}eskie zametki},
     pages = {51--56},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1977_21_1_a5/}
}