Voir la notice de l'article provenant de la source Mathematicac Balkanica website
@article{MABA_2001_15_1-2_a2, author = {Ch. Atakut and N. Ispir}, title = {The {Order} of {Approximation} by {Certain} {Linear} {Positive} {Operators}}, journal = {Mathematica balkanica}, pages = {25}, publisher = {mathdoc}, volume = {15}, number = {1-2}, year = {2001}, url = {http://geodesic.mathdoc.fr/item/MABA_2001_15_1-2_a2/} }
Ch. Atakut; N. Ispir. The Order of Approximation by Certain Linear Positive Operators. Mathematica balkanica, Tome 15 (2001) no. 1-2, p. 25. http://geodesic.mathdoc.fr/item/MABA_2001_15_1-2_a2/