@article{MZM_1977_21_6_a5,
     author = {V. V. Zhuk},
     title = {Certain exact bounds for seminorms given on spaces of periodic functions},
     journal = {Matemati\v{c}eskie zametki},
     pages = {789--798},
     year = {1977},
     volume = {21},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1977_21_6_a5/}
}