Geodesic
On the order of approximation of functions of class $Z_1$ by positive linear polynomial operators
Trudy Matematicheskogo Instituta imeni V.A. Steklova, Tome 19 (1964) no. 2 
I. M. Petrov. On the order of approximation of functions of class $Z_1$ by positive linear polynomial operators. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Tome 19 (1964) no. 2. http://geodesic.mathdoc.fr/item/RM_1964_19_2_a7/
@article{RM_1964_19_2_a7,
     author = {I. M. Petrov},
     title = {On the order of approximation of functions of class $Z_1$ by positive linear polynomial operators},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1964},
     volume = {19},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1964_19_2_a7/}
}
TY  - JOUR
AU  - I. M. Petrov
TI  - On the order of approximation of functions of class $Z_1$ by positive linear polynomial operators
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1964
VL  - 19
IS  - 2
UR  - http://geodesic.mathdoc.fr/item/RM_1964_19_2_a7/
LA  - ru
ID  - RM_1964_19_2_a7
ER  - 
%0 Journal Article
%A I. M. Petrov
%T On the order of approximation of functions of class $Z_1$ by positive linear polynomial operators
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1964
%V 19
%N 2
%U http://geodesic.mathdoc.fr/item/RM_1964_19_2_a7/
%G ru
%F RM_1964_19_2_a7

Voir la notice de l'article provenant de la source Math-Net.Ru