@article{VMUMM_1989_6_a24,
     author = {A. S. Kochurov},
     title = {Estimates for absolute widths of function classes},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {82--85},
     year = {1989},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1989_6_a24/}
}