@article{1183530299,
author = {Bojanic, R. and DeVore, R.},
title = {A proof of Jackson's theorem},
journal = {Bull. Amer. Math. Soc.},
volume = {75},
number = {5},
year = {1969},
pages = { 364-367},
language = {en},
url = {http://dml.mathdoc.fr/item/1183530299}
}
Bojanic, R.; DeVore, R. A proof of Jackson's theorem. Bull. Amer. Math. Soc., Tome 75 (1969) no. 5, pp. 364-367. http://gdmltest.u-ga.fr/item/1183530299/