Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{NUMA_1959__1_131433, author = {P.C. SIKKEMA}, title = {\"Uber den {Grad} der {Approximation} mit {Bernstein-Polynomen.}}, journal = {Numerische Mathematik}, pages = {221--239}, publisher = {mathdoc}, volume = {1}, year = {1959}, zbl = {0089.27503}, url = {http://geodesic.mathdoc.fr/item/NUMA_1959__1_131433/} }
P.C. SIKKEMA. Über den Grad der Approximation mit Bernstein-Polynomen.. Numerische Mathematik, Tome 1 (1959), pp. 221-239. http://geodesic.mathdoc.fr/item/NUMA_1959__1_131433/