@article{RM_1987_42_4_a21,
     author = {K. I. Babenko and N. S. Bakhvalov and V. M. Tikhomirov and V. B. Demidovich},
     title = {School-Seminar {{\textquotedblleft}Approximation} {Theory} and {Problems} of {Calculus} {Mathematics{\textquotedblright}}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1987},
     volume = {42},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1987_42_4_a21/}
}