@article{1178240698,
author = {Nishishiraho, Toshihiko},
title = {The degree of convergence of positive linear operators},
journal = {Tohoku Math. J. (2)},
volume = {29},
number = {4},
year = {1977},
pages = { 81-89},
language = {en},
url = {http://dml.mathdoc.fr/item/1178240698}
}
Nishishiraho, Toshihiko. The degree of convergence of positive linear operators. Tohoku Math. J. (2), Tome 29 (1977) no. 4, pp. 81-89. http://gdmltest.u-ga.fr/item/1178240698/