@article{ISU_2007_7_1_a6,
     author = {S. P. Sidorov},
     title = {Shape-preserving linear n-width of unit balls in $C[0,1]$},
     journal = {Izvestiya of Saratov University. Mathematics. Mechanics. Informatics},
     pages = {33--39},
     publisher = {mathdoc},
     volume = {7},
     number = {1},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ISU_2007_7_1_a6/}
}