@article{MZM_1970_7_1_a2,
     author = {S. O. Kallaev},
     title = {De la {Vall\'e} {Poussin} means of {Fourier--Gegenbauer} series},
     journal = {Matemati\v{c}eskie zametki},
     pages = {19--30},
     publisher = {mathdoc},
     volume = {7},
     number = {1},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1970_7_1_a2/}
}