@article{TIMM_1998_5_a18,
     author = {V. Yu. Popov},
     title = {Exact {Jackson--Stechkin} inequality in the space $L_2$ on hyperboloid},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {254--266},
     publisher = {mathdoc},
     volume = {5},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_1998_5_a18/}
}