@article{MZM_1978_24_1_a1,
     author = {B. M. Bredikhin and T. I. Grishina},
     title = {An elementary estimate of $G(n)$ in {Waring's} problem},
     journal = {Matemati\v{c}eskie zametki},
     pages = {7--18},
     publisher = {mathdoc},
     volume = {24},
     number = {1},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1978_24_1_a1/}
}