@article{MZM_2000_68_2_a0,
     author = {S. A. Ivanov and S. A. Avdonin},
     title = {The {Levin--Golovin} theorem for {Sobolev} spaces},
     journal = {Matemati\v{c}eskie zametki},
     pages = {163--172},
     publisher = {mathdoc},
     volume = {68},
     number = {2},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2000_68_2_a0/}
}