@article{MZM_1975_17_4_a4,
     author = {V. P. Motornyi and V. I. Ruban},
     title = {Diameters of some classes of differentiable periodic functions in the space $L$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {531--543},
     publisher = {mathdoc},
     volume = {17},
     number = {4},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1975_17_4_a4/}
}