@article{DAN_1993_328_4_a1,
     author = {I. A. Blatov and V. V. Strygin},
     title = {Estimates that are unimprovable with respect to order in},
     journal = {Doklady Akademii Nauk},
     pages = {424--426},
     publisher = {mathdoc},
     volume = {328},
     number = {4},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1993_328_4_a1/}
}