@article{ZVMMF_1989_29_5_a3,
     author = {V. G. Bazhenov and D. T. Chekmarev},
     title = {On index commutativity in numerical differentiation},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {662--674},
     publisher = {mathdoc},
     volume = {29},
     number = {5},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1989_29_5_a3/}
}