@article{CHEB_2021_22_5_a9,
     author = {A. D. Manov},
     title = {On an extremal problem for positive definite functions},
     journal = {\v{C}eby\v{s}evskij sbornik},
     pages = {161--171},
     publisher = {mathdoc},
     volume = {22},
     number = {5},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHEB_2021_22_5_a9/}
}