@article{TM_1987_180_a142,
     author = {I. A. Shevchuk},
     title = {Addendum to direct approximation theorems of {S.} {M.~Nikol'skij} type on an interval, and inverse theorems},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {230--232},
     year = {1987},
     volume = {180},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1987_180_a142/}
}