Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1968_11_a13, author = {A. G. Ramm}, title = {Numerical differentiation}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {131--134}, publisher = {mathdoc}, number = {11}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1968_11_a13/} }
A. G. Ramm. Numerical differentiation. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 11 (1968), pp. 131-134. http://geodesic.mathdoc.fr/item/IVM_1968_11_a13/