@article{VMUMM_1989_3_a24,
     author = {Yu. V. Egorov and V. A. Kondratiev},
     title = {On a problem of numerical differentiation},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {80--81},
     publisher = {mathdoc},
     number = {3},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1989_3_a24/}
}