@article{ZNSL_1997_247_a2,
     author = {O. L. Vinogradov},
     title = {The sharp constant in the estimate of the {Rogozinski} sums deviation in terms of the second modulus of continuity
},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {26--45},
     publisher = {mathdoc},
     volume = {247},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1997_247_a2/}
}