@article{MZM_1983_33_5_a4,
     author = {S. A. Malyugin},
     title = {Sharp estimates of norms in~$C$ of orthogonal projection onto subspaces of polygons},
     journal = {Matemati\v{c}eskie zametki},
     pages = {689--699},
     publisher = {mathdoc},
     volume = {33},
     number = {5},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1983_33_5_a4/}
}